Search

In contrast to the observed high-temperature superconductivity in monolayer FeSe / SrTiO 3 films, akin to CoS b / SrTiO 3 , the bulk counterpart, FeSe, does not exhibit superconductivity even under elevated pressure, and its magnetic characteristics remain subject to debate. This investigation delves into the electrical and magnetic attributes, alongside X-ray photoelectron spectroscopy (XPS) analysis, of FeSe mono-crystal. Magnetic and electrical transport assessments indicate that FeSe demonstrates characteristics of a Pauli paramagnetic metal within non-Fermi liquid traits. XPS analysis further reveals that the Fe and Se pair in FeSe exist in a zero-valence state, forming a predominantly metallic-bonded alloy. The Pauli paramagnetism observed in FeSe is ascribed to its itinerant electrons. The comprehension of the electronic states in FeSe mono-crystal not only clarifies its lack of magnetic characteristics but also paves the way for exploring potential high-temperature superconductivity. [ABSTRACT FROM AUTHOR]

This correction notice provides additional explanation and clarification regarding Figure 1 and the X-ray diffraction (XRD) patterns of iron pyrite nanoparticles. The authors state that the XRD patterns of two samples exhibit a notable degree of similarity, with minor differences in the intensity of diffraction peaks. The correction also confirms the high purity of the obtained sample and provides information about the structure and symmetry of the pyrite. The authors assure that the scientific conclusions remain unaffected. [Extracted from the article]

In this work, we study the effect of increasing temperature on the structure parameters (lattice, sulfur–sulfur distance, and ruthenium–sulfur distance) and the energy gap of RuS2. However, it was very challenging to obtain a sample of RuS2 due to many factors, some of which are discussed in the introduction. To prepare the crystal growth of RuS2, we have used the chemical vapor transport technique. The crystals obtained show a pyrite structure, of which we studied its crystallographic structure, including the structure of crystals in surface (100). The sample was then characterized by X-ray diffraction and by microprobe analysis. We determine the relationship between the energy gap and the sulfur–sulfur distance. We analyzed the S-S bond compared with the S2 molecule. [ABSTRACT FROM AUTHOR]