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Abstract: The nature of the formation of a chemical bond at the magnetite–gold interface has been studied. The geometric structure and the electronic and magnetic properties of plane layers consisting of magnetite Fe3O4and gold have been investigated using the DFT-GGA calculation. It has been found that the specific energy and the wetting parameter of the magnetite–gold interface are negative, which leads to the island growth of small Au particles on the Fe3O4surface. The role of an intermediate thin titanium layer between magnetite and gold has been discussed. The specific energy and wetting parameter of the magnetite–titanium (for thin Ti layers) and magnetite–titanium–gold interfaces are positive. It has been suggested that an intermediate thin titanium layer at the interface between the magnetite nanoparticle surface and the gold layer will make it possible to obtain magnetite nanoparticles with a continuous gold coating.

Abstract: Calculations of the magneto-optical Voigt parameter Qwere carried out using various models of reflecting media for thin films Fe|SiO2|Si(100) samples using the data of the in situ magneto-ellipsometry. The obtained spectral dependences of Qmake it possible to choose the algorithm for the analysis of experimental magneto-ellipsometry data and demonstrate that magneto-optical parameter Qof iron is thickness-dependent.

Ferromagnetic single-crystal epitaxial Fe3Si films and polycrystalline Fe5Si3films are obtained on Si substrates by molecular-beam epitaxy with in situ control of the structure, optical, and magnetic properties. The results of the structural, magnetic, and optical measurements are discussed. The experimental data are compared to the results of the microscopic calculation of the spin-polarized structure, the permittivity, and the optical conductivity spectra.

Weak ferromagnetic moment along the triad axis of FeBO3crystals has been calculated on the basis of the single-ion model taking into account the cubic invariant of the crystal field in the spin Hamiltonian.

Magnetic and thermodynamic properties of perovskite Gd0.2Sr0.8CoO3−δ, with ordered and disordered states of Gd and Sr in the A-sites of the crystal lattice have been studied revealing remarkable differences in the physical properties of the ordered and disordered states. The ordered samples have larger oxygen nonstoichiometry, heat capacity, and thermal expansion anomalies, and abnormal temperature dependence of the magnetization around 350 K.

The phase diagram of an antiferromagnet with the spin crossover from the high-spin to low-spin state with S= 0 with increasing external pressure has been calculated with regard to the pressure dependence of the exchange integral. The calculated results are compared with the experimental data on ferropericlase FexMg1 – xO.

Through the description of several simple atomic-scale systems for illustration, the hydrodynamical interpretation of results of solving the üme-dependent Schrödinger equation is used to elucidate the fundamental processes of angular momentum and energy transfer. Connections are made between the hydrodynamical interpretation and conventional views such as interference of superpositions of states. Along with previous theoretical and experimental demonstration of the existence of the hydrodynamical signatures born in atomic-scale interactions and remaining in the asymptotic observables, these illustrations show the complementarity of the hydrodynamical and conventional pictures as well as additional insight provided by the former. [ABSTRACT FROM AUTHOR]

Anisotropy mechanisms in compounds with S-state ions are discussed, including the 'single-ion' exchange mechanism that was developed theoretically by Nikiforov and coworkers based on the two-ion model and which has only recently received detailed experimental study. Results demonstrating the significant role of the 'single-ion' source are presented. An independent generalized method for quantitatively describing and predicting the anisotropy of magnetically ordered crystals is discussed, and its potential for the investigation of the BiFeO$ _3$ multiferroic in the region of the existence of a spin cycloid is examined. The anisotropic interactions responsible for the formation of nanostructures in the form of spin vortices (skyrmions) in MnSi and Cu$ _2$OSeO$ _3$ are analyzed.

The solid-phase synthesis of manganese silicides on the Si(100)2 × 1 surface coated at room temperature by a 2-nm-thick manganese film has been investigated using high-energy-resolution photoelectron spectroscopy with synchrotron radiation. The dynamics of variation of the phase composition and electronic structure of the near-surface region with increasing sample annealing temperature to 600°C, has been revealed. It has been shown that, under these conditions, a solid solution of silicon in manganese, metallic manganese monosilicide MnSi, and semiconductor silicide MnSi1.7are successively formed on the silicon surface. The films of both silicides are not continuous, with the fraction of the substrate surface occupied by them decreasing with increasing annealing temperature. The binding energies of the Si 2pand Mn 3pelectrons in the compounds synthesized have been determined.

A method for calculating the contribution of exchange interaction to uniaxial anisotropy with the use of g’ factors has been worked out using CoCO3crystals as an example. The calculated contribution of dipole-dipole interactions to the anisotropy of CoCO3is 0.93 cm−1. The sum of the contributions to the anisotropy constant of CoCO3with the inclusion of the dipole-dipole interactions is 36.1 cm−1.

Initial growth stages of manganese films on the Si(100)2 × 1 surface at room temperature have been investigated using high-energy-resolution photoelectron spectroscopy, and the dynamics of the variation in their phase composition and electronic structure with the coverage growth has been revealed. It has been shown that the interfacial manganese silicide and the film of the solid solution of silicon in manganese are sequentially formed under these conditions on the silicon surface. The growth of the metal manganese film starts after the deposition of ∼0.9 nm Mn. Segregation of silicon on the film surface is observed in the range of coverages up to 1.6 nm Mn.

Features of a defective microstructure and the mechanical properties of titanium nitride coatings having different copper content are investigated by means of transmission electron microscopy, X-ray structural analysis, microhardness measurement, and scratch tests. It is shown that, under a relatively low deposition temperature and ion-induced surface activation during the growth of a TiN-Cu coating, a highly defective single-phase crystalline state of titanium nitride is formed at a copper concentration of up to 12 at %. The noted state is characterized by a scale hierarchy of the lattice fragmentation from sizes of ∼10–15 to 100 nm, high bending-torsion of the crystal lattice (tens of degrees per micron), and a level of local internal stresses from ∼E/40 to ∼E/120 (Eis the modulus of elasticity). The revealed high gradients, including those of a dipole character, for the bending-torsion on characteristic scales up to some tens of nanometers can be described within the framework of a model for the continuous distribution of dislocation-disclination ensembles. The effect of the copper content on an increase in the degree of dispersion of the subgrained structure, a decrease in the local bending-torsion of the crystal lattice within subgrains, the level of local internal stresses, and variation of the hardness and strength in scratch tests is revealed.

Single crystals of cobalt ludwigite Co3O2BO3with diamagnetic substitution of Ga3+ions for a part of the cobalt ions have been grown by the flux method. A detailed investigation of the crystal structure and magnetic properties of the compound has been carried out. A preferred character of the occupation of nonequivalent crystallographic positions by gallium has been revealed. It has been found that the effective magnetic moment and the magnetic ordering temperature are decreased compared to those in the original crystal of the Co3O2BO3ludwigite. It has been noted that the pronounced magnetic anisotropy observed in the crystallographic abplane of the original material of the Co3O2BO3composition disappears in the presence of gallium.Single crystals of cobalt ludwigite Co3O2BO3with diamagnetic substitution of Ga3+ions for a part of the cobalt ions have been grown by the flux method. A detailed investigation of the crystal structure and magnetic properties of the compound has been carried out. A preferred character of the occupation of nonequivalent crystallographic positions by gallium has been revealed. It has been found that the effective magnetic moment and the magnetic ordering temperature are decreased compared to those in the original crystal of the Co3O2BO3ludwigite. It has been noted that the pronounced magnetic anisotropy observed in the crystallographic abplane of the original material of the Co3O2BO3composition disappears in the presence of gallium.

Abstract: Temperature and magnetic-field dependences of the static magnetization of polycrystalline cobaltite GdCoO3 have been measured. The magnetic properties of the GdCoO3 sample have been studied in the paramagnetic and antiferromagnetic states. The magnetic phase diagram has been constructed. The exchange field between the Gd-Gd sublattices and the anisotropy field have been estimated.

The energy spectra of electrons ejected in He2+--He collisions were measured in the ion energy range 6-30 keV. Theoretical analysis of the ionization mechanisms has been performed on the basis of the advanced adiabatic approximation for one-electron processes and perturbation theory for two-electron processes. The ionization channel 2pσ² → 1sσ ndσ → 1sσ εdσ has been revealed, which makes a considerable contribution to the ionization cross section in the keV ion energy range. [ABSTRACT FROM AUTHOR]

Using a fully correlated, four-dimensional lattice, time-dependent Schrödinger equation model of the collisions of bare projectile ions with two-electron atoms (H+, He2+ + He), we demonstrate the existence of vortices in the resulting spectrum of ejected electrons. Following the uncovering of these features in collisions involving only one electron (H+ + H) [Macek et al. Phys. Rev. Lett. 102 143201 (2009)], this demonstration provides impetus for seeking these features in more readily feasible experimental conditions using a cold helium target and the reaction microscope technique. [ABSTRACT FROM AUTHOR]

Abstract: The concentration dependence of the entropy of doped Mott-Hubbard insulators has been considered within the t-J model. It has been shown that a change in the type and statistics of charge carriers as compared to the Fermi gas leads to a radical change in the entropy s, in particular, to the giant growth of the entropy upon doping. The quantity ∂s/∂x ≈ k B is approximately consistent with the experimental data for HTSC cuprates in the pseudogap phase.

Abstract: The contributions of the anisotropic exchange to the firstand second-order uniaxial anisotropy constants have been calculated for hematite at T = 0 K and arbitrary temperatures. The results of the calculations and the most significant mechanisms are taken into account in interpreting the temperature dependence of the anisotropy in rhombohedral antiferromagnetic crystals. The first-order anisotropy constant for hematite is described by the dipole interaction, contributions of the “single-ion” nature, and relatively small contributions of the anisotropic exchange. The second-order constant for hematite includes the “single-ion” contribution and the contribution of the anisotropic exchange. For FeBO3 and MnCO3 crystals, the main contributions to the first-order anisotropy constant come from the dipole and single-ion mechanisms.

Abstract: Ludwigite single crystals of compositions Co3O2BO3 and Co3 − x Fe x O2BO3 (x ≈ 0.14) have been synthesized. The crystal structure is investigated at room temperature, and the magnetization is studied in the temperature range T = 4.2–100 K in magnetic fields of up to 600 Oe. The orthorhombic symmetry is revealed, and the unit cell parameters are determined. A number of features are established for the temperature dependence of the magnetization. In unsubstituted Co3O2BO3, two magnetic transitions are found at T C1 = 43 K and T C2 = 15 K. At temperatures below 40 K, spin-glass state is revealed. Substitution of iron ions for cobalt ions leads to a noticeable shift in the magnetic transitions toward the high-temperature range: T C1 = 83 K and T C2 = 74 K. A ferromagnetic ordering of the P type is found in the Co3 − x Fe x O2BO3 (x ≈ 0.14) compound.

Abstract: The temperature evolution of in-gap states created by the spin polaron effect and located within the gap with charge transfer between the valence and conduction bands is studied for the case of strong electron correlations using the t-t′-t″-J model of antiferromagnetic undoped cuprates. The effect of temperature is taken into account by temperature renormalization of the magnon concentration, which is calculated using the Heisenberg model with inclusion of weak interlayer exchange and weak in-plane spin anisotropy, and by introducing a Lorentzian with a temperature-dependent half-width in the form corresponding to the marginal Fermi liquid model. With increasing temperature, the spectral weight of the in-gap state, which is proportional to the magnon concentration, grows leading to an increased intensity of the corresponding peak of the spectral function in all points of the Brillouin zone. At points (π/2, π/2) and (π, 0), the main peak is approached by the satellite peak related to the in-gap band and, at points (0, 0) and (π, π), the peaks move away from each other.

Abstract: The effective spin Hamiltonian for undoped cuprates is constructed in the framework of the realistic multiband p-d model with the parameters calculated from first principles. The exchange interaction parameter is defined as the sum of the antiferromagnetic and ferromagnetic contributions, which are determined by the two-hole triplet terms. The ferromagnetic and antiferromagnetic contributions of the excited terms compensate each other to a large extent. It is shown that the antiferromagnetic contribution of the two-hole ground singlet 1 A 1g to the exchange interaction is dominant.

Abstract: The ternary superionic conductor AgCuS was studied by means of inelastic neutron scattering at temperatures of 150 to 398 K. The experimental time-of-flight spectra were recalculated into the generalized phonon density of states G(ɛ) in an incoherent approximation. It is shown that G(ɛ) of AgCuS has a nontrivial temperature dependence over the low-energy range. The relation between the temperature dependence of G(ɛ) and the existence of a low-energy mode in AgCuS is discussed.

The temperature and magnetic field dependences of the static magnetization of the polycrystalline rare-earth cobaltites GdCoO3and SmCoO3have been measured. It is shown that, below room temperature, the magnetization of both compounds derives primarily from the rare-earth ion paramagnetism. The GdCoO3and SmCoO3compounds have been found to differ substantially in magnetic behavior, which can be traced to differences in their electronic shell structures. The magnetic behavior of GdCoO3is close to that of an array of free Gd3+ions, whereas in SmCoO3the deviation from the free-ion properties is very large because of the Sm3+ground state being crystal-field split. Van Vleck magnetic susceptibility measurements of SmCoO3suggest that the splitting is ∼10 K.

The band structure of the Nd2 − xCexCuO4HTSC is calculated using the LDA+GTB method, which combines the local density approximation (LDA) and the generalized tight-binding (GTB) method. Two mechanisms of the concentration dependence of the band structure (single-electron and many-electron mechanisms) are taken into account. It is demonstrated that the main contribution to the evolution of the band structure with doping comes from the many-electron mechanism.

Abstract: A coordinated investigation of the magnetic and electrical properties of polycrystalline cobalt oxide compounds CdCoO3, Gd0.9Ba0.1CoO3, and Gd0.9Sr0.1CoO3 is carried out. Undoped GdCoO3 reveals a low conductivity; a magnetic moment of 7.4 μB per molecule, which is less than the theoretical value for the Gd3+ ion; and an asymptotic Curie temperature of −6 K. Doping GdCoO3 with barium and strontium to substitution of 10 at. % Gd brings about an increase in the conductivity and magnetic transitions at T = 300 K for Gd0.9Ba0.1CoO3 and T = 170 K for Gd0.9Sr0.1CoO3. The magnetization anomalies imply the formation of magnetic clusters. The behavior of the electrical conductivity at high temperatures suggests a variable activation energy. At low temperatures, Mott hopping conduction sets in.

Abstract: The temperature dependence of the magnetization of (Fe/Si) n multilayer films with nanometer layers is investigated. The films are prepared through thermal evaporation under ultrahigh vacuum onto Si(100) and Si(111) single-crystal substrates. It is revealed that the thickness of individual iron layers in (Fe/Si) n multilayer films affects the magnetization and its temperature dependence. The inference is made that this dependence is associated with the formation of a chemical interface at the Fe-Si boundaries. The characteristics of the chemical interface in the (Fe/Si) n films are estimated.

Analysis of the experimental optical spectra of CuO nanoparticles with the electronic structure characterized by strong electron correlations has revealed the appearance of unusual states inside the band gap. The intragap states and the specific features of the electronic structure of CuO nanoparticles are discussed in the framework of the generalized tight-binding method previously developed for describing the electronic structure of superconducting cuprates.

Abstract: A mechanism for the magnetic ordering of dysprosium in Dy1−x Ni x -Ni bilayer films is proposed. This ordering was discovered earlier by the authors when studying magnetic circular dichroism. For x exceeding a threshold value (∼0.05), the contribution from the Dy1−x Ni x layer in a bilayer film to the magnetic circular dichroism over the temperature range 80–300 K is approximately equal in magnitude to the magnetic circular dichroism observed in a single-layer Dy film at temperatures below the ferromagnetic phase transition temperature of Dy (∼100 K). Since magnetic circular dichroism is an effect linear in magnetization, the observed effect is associated with magnetic ordering of the Dy1−x Ni x layer in bilayer films due to the simultaneous influence of two factors: the incorporation of Ni into the Dy layer and the influence of the continuous Ni sublayer. The ferromagnetic ordering of a dysprosium layer doped with nickel (under conditions of an atomic contact with a continuous nickel layer) was confirmed by the field dependences of the polar and longitudinal Kerr effects. It was shown that both layers in the bilayer structure are magnetized in the same direction and characterized by an anisotropy of the easy-plane type. The magnetic ordering is assumed to be due to the change in the density of states of the Dy1−x Ni x alloy caused by hybridization with the narrow peaks near the Fermi level characteristic of nickel.

Abstract: For cuprates of the n and p types, the effect of pressure on the electronic structure of a CuO2 layer is studied. In the calculations performed, a generalized tight-binding method is used taking into account the influence of strong electronic correlations on the electronic structure of cuprates. The results obtained demonstrate the unusual effect of pressure on the nature of quasiparticle states at the top of the valence band in p-type cuprates. As the pressure increases, the hole states in these materials cease to be Zhang-Rice singlets and become combined singlet-triplet states.

Abstract: The optical absorption spectra of single-crystal ferroborate GdFe3(BO3)4 and GdFe2.1Ga0.9(BO3)4 are measured and interpreted. It is found that the absorption edge and the absorption bands A, B, and C observed below the edge are close to those for FeBO3. A many-electron model of the band structure of GdFe3(BO3)4 is suggested including strong electron correlations between the iron d states. It is shown that GdFe3(BO3)4 has a charge-transfer dielectric gap. A rise in pressure is predicted to result in a crossover between the high-spin and low-spin states of the Fe3+ ion, collapse of the magnetic moment, a weakening of Coulomb correlations, an abrupt reduction in the energy gap, and an insulator-semiconductor transition.

Abstract: The Mssbauer effect in the Fe1− x VxBO3 solid solutions has been measured at 130 and 300 K. The Fe0.05V0.95BO3 composition was studied in the interval 4.2–300 K. The experimental data obtained are described in terms of the model of a dilute magnetic insulator in which atoms of the first coordination sphere provide a major contribution to the hyperfine field at iron nucleus sites. It was found that, at low temperatures, the field H hf is generated primarily by the iron ion itself and depends only weakly on substitution. The hyperfine interaction parameters in the discrete configuration series 6Fe, 5Fe1V, 4Fe2V, 3Fe3V, and 2Fe4V were deter-mined. The magnitude of the isomer shift suggests that iron in the crystal resides in the trivalent state.

Abstract: The nature of chemical bonding in carbon nanoclusters is investigated by the PM3 semiempirical quantum-chemical method. The influence of the atomic structure on the electronic characteristics and chemical properties of nanoclusters is analyzed. A σ-π model is proposed for the chemical bonding in nanotubes. It is shown that, in the framework of the proposed model, nanotubes are objects characterized by a small contribution of π states to the valence band top.

Abstract: A model is proposed for calculating the thermodynamic functions and the equilibrium density of a one-dimensional chain of molecules (atoms) adsorbed inside a narrow nanotube. The model considers both the interaction between introduced atoms (molecules) and their interaction with the nanotube walls. The quantum-mechanical effects resulting in discrete energy levels of a particle and in its smeared position between neighbors are taken into account. In calculating the free energy at a nonzero temperature, the phonon contribution and the particle transitions to excited levels are considered. The model is applied to calculate the thermodynamic parameters of adsorbed hydrogen molecules inside extremely narrow single-wall carbon nanotubes of the (3,3) and (6,0) type. It is shown that external pressure gives rise to a sequence of first-order phase transitions, which change the density of adsorbed hydrogen molecules.

Abstract: The spectrum of Fermi excitations of a nondegenerate ferromagnetic semiconductor at T=0 with one electron present is investigated in order to describe the electronic structure of manganites with inclusion of strong electron correlations within the Anderson periodic model with s-d exchange interaction. Exact dispersion relations and the Green functions for different spin projections are found. The density-of-states function is calculated for different positions of the d level relative to the band bottom.

Abstract: This paper reports on the results of investigations into the temperature and spectral dependences of the magnetic circular dichroism in Dy1−x Nix-Ni bilayer films prepared through thermal sputter deposition of components under ultrahigh vacuum. The distribution of the components over the layer thickness is examined by Auger spectroscopy. The nickel content x in Dy1−x Nix layers varies from 0.005 to 0.06. It is shown that, in the temperature range 80–300 K, the contribution made to the magnetic circular dichroism by a Dy1−x Nix layer in a bilayer film with a nickel content higher than the threshold value is approximately equal to the magnetic circular dichroism observed in an isolated Dy1−x Nix film at temperatures below the temperature of the phase transition to a ferromagnetic state (∼100 K). This phenomenon is explained by magnetic ordering in the Dy1−x Nix layer of the bilayer film due to the combined effect of two factors, namely, the incorporation of nickel into a dysprosium layer and the presence of a continuous nickel sublayer in the film.

Abstract: By on the analyzing the general structure of the Green function of a strongly correlated electron system, it is shown that, for the regime of strong correlations, Luttinger’s theorem should be generalized in the following way: the volume of the Fermi surface of the system of noninteracting particles is equal to that of the quasiparticles in the strongly correlated system with due regard for the spectral weight of the quasiparticles. An investigation of the t-J model and of the Hubbard model, as applied to the paramagnetic nonsuperconducting phase, shows that the generalized Luttinger theorem is valid for these models.

Abstract: The evolution of optical absorption in a two-dimensional antiferromagnet is investigated in the range of the transition 6 A 1g → 4 A 1g , 4 E g (4 G) observed in manganese ions in an external magnetic field inducing noncollinearity of the magnetic structure. It is revealed that hot and cold satellites of the exciton-magnon bands appear in the optical absorption spectrum and then increase in intensity. The shapes of the magnon satellite bands corresponding to a two-dimensional magnetic structure are calculated. It is demonstrated that magnons at the inner points of the Brillouin zone appreciably contribute to the absorption. The zero-point magnetic oscillations play a decisive role in the absorption associated with the magnon decay at low temperatures.

Abstract: The spectral density (SD) in the ARPES spectra of antiferromagnetic (AFM) dielectrics Sr2CuO2Cl2 and Ca2CuO2Cl2 along the principal symmetry directions of the Brillouin zone was studied by the generalized tight binding method. At the valence band top of these undoped cuprates in the AFM state, there is a pseudogap of magnetic nature with E s(k)∼0–0.4 eV between a virtual level and the valence band proper. The observed similarity of dispersion along the Γ-M and X-Y directions can be explained by the proximity of the 3 B 1g triplet and the Zhang-Rice singlet levels. The value of parity of the polarized ARPES spectra at the Γ, M, and X points calculated for the AFM phase of undoped cuprates with an allowance for the partial contributions is even. The conditions favoring observation of the partial contributions in polarized ARPES spectra are indicated. Due to the spin fluctuations, the virtual level acquires dispersion and possesses a small spectral weight. Probably, this level cannot be resolved on the background of the main quasi-particle peak as a result of the damping effects.

Abstract: The atomic and electron structures of toroidal carbon molecules (C240 and two C120 isomers) and related endohedral complexes with lithium (Li2@Cn and Li4@Cn) were theoretically studied using both nonempirical (3–21G basis set) and semiempirical (MNDO) calculation schemes. For the metal-containing compounds, the behavior of lithium atoms embedded into internal cavities of the carbon framework was studied using methods of molecular dynamics. It is demonstrated that the structure of electron levels of metal-containing carbon complexes exhibits an embedded state in the forbidden band, which appears due to the presence of electrons accepted from metal atoms. The position of this embedded state and the bandgap width depend both on the initial carbon structure and on the amount of metal atoms incorporated.

Abstract: The electronic structures of all the possible isomers of endohedral and exohedral C60 fullerene complexes with two lithium atoms are theoretically investigated. It is found that the electronic structures of these compounds are characterized by an impurity filled-level state determining the band gap. The location of the impurity state and, correspondingly, the band gap of the exohedral fullerene complexes depend on the coordination mode and the distance between the alkali metal ions. A similar dependence is observed for the total energy of the exohedral fullerene complex under investigation.

Abstract: The region of the concentration magnetic phase transition in a CuxZn1−x Cr2Se4 chalcogenide spinel in which the substituted ion concentration x smoothly varies from 0.1 to 0.2 with a step of 0.02 is thoroughly investigated. An anomalous behavior of the Curie temperature is observed. This anomaly is associated with the nucleation of ferromagnetically ordered microregions in the vicinity of Cr ions with an intermediate valence and subsequent long-range magnetic ordering at a critical Cu concentration in the range 0.12 c <0.14. The possible coexistence of ferro-and antiferromagnetism in the same temperature range is revealed.

Abstract: The effective Hamiltonian for a realistic multiband p-d model is developed. In the case of electron doping, the Hamiltonian coincides with that for the standard t-J model. For hole doping, the singlet-triplet t-J model takes place.

Abstract: The atomic and electronic structure of some endo-, exo-, and endo-exohedral complexes of the fullerene C60 with various guest atoms and molecules (Hen, H2, and Li2) are investigated using semiempirical and nonempirical quantum-chemical methods. The atomic core dynamics is studied by the method of molecular dynamics. It is shown that guest atoms and molecules in fullerene polyhedra acquire an orbital angular momentum due to the correlated motion of nuclei above the low-energy barriers of the potential surface within the carbon polyhedron even at low temperatures (from 4 to 78 K). The emergence of orbital angular momenta of nuclei of guest atoms and molecules is attributed to a change in the contribution of the orbital angular momentum of electrons to the potential surface of the complexes. The motion of Li ions in a polyhedron leads to blurring of the top of the valence band and to the emergence of a charge polarization wave in the carbon polyhedron.

Abstract: The correlation between the magnetic and electrical properties of the (VS)x(Fe2O3)2−x (0.9

Abstract: The effect of the manganese doping of vanadium monosulfide in a system of the V1−x MnxS (0