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Gapless Chiral Superconducting (d + id)-Wave Phase in Strongly Correlated Layered Material with a Triangular Lattice
- Source :
- Journal of Experimental and Theoretical Physics. 130:235-246
- Publication Year :
- 2020
- Publisher :
- Pleiades Publishing Ltd, 2020.
-
Abstract
- It is shown that interlayer electron tunneling in the quasi-two-dimensional ensemble of Hubbard fermions leads to the realization of the gapless superconducting phase with the chiral (d + id)-wave order parameter symmetry, not for a single value of sodium ion concentration, but in a wide range of concentrations. Precisely this situation corresponds to experimental data on the layered sodium cobaltite intercalated by water (NaxCoO2 ⋅ yH2O). Intra-atomic electron repulsion that determines the strong electron correlation regime leads to the representation of Hubbard fermions, the interaction of which ensures Cooper instability. Intersite intralayer interactions between fermions considerably affect the positions of nodal points of the chiral order parameter and change the critical concentration at which a topological transition occurs in the 2D system of Hubbard fermions.
- Subjects :
- Condensed Matter::Quantum Gases
Superconductivity
Physics
Condensed matter physics
Electronic correlation
Solid-state physics
High Energy Physics::Lattice
General Physics and Astronomy
Fermion
Electron
01 natural sciences
Cobaltite
chemistry.chemical_compound
Gapless playback
chemistry
Condensed Matter::Superconductivity
0103 physical sciences
Condensed Matter::Strongly Correlated Electrons
Hexagonal lattice
010306 general physics
Subjects
Details
- ISSN :
- 10906509 and 10637761
- Volume :
- 130
- Database :
- OpenAIRE
- Journal :
- Journal of Experimental and Theoretical Physics
- Accession number :
- edsair.doi...........2f98c18c4875e2f57fc7fe018872a191