| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1594950 | Solid State Communications | 2008 | 5 Pages |
Abstract
Some properties of hydrated cobalt oxides NaxCoO2⋅yH2O in the superconductor phase are studied using an extended Hubbard model on a triangular lattice. We derive the superconductive ordering temperatures for singlet and triplet symmetries by means of the Green’s functions of the system, calculated within a combined mean field and Hubbard I type approximation. It is found that both symmetries are possible. The coexistence of d+id′ and p+ip′ pairing, in a certain doping region, is observed, but the s-extended pairing seems to be the more stable. The critical temperatures for superconductivity are calculated for both symmetries and compared to experimental results.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Christopher Thomas, Acirete S. da Rosa Simões, J.R. Iglesias,