Abstract
With NaxCoO2·yH2O in mind, a single-band t-J model on a triangular lattice is studied, using a variational Monte Carlo method. It is found that among various superconducting symmetries, a d+id wave is the most stable for any hole density δ, and irrespective of the sign of hopping integral t; a simple d wave, however, has a fairly close energy. Triplet superconductivity is not realized. For t<0, Nagaoka ferromagnetism is dominant in a wide range of δ and J/|t|, which eliminates the possibility of superconductivity for realistic model parameters.
Original language | English |
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Pages (from-to) | 95-98 |
Number of pages | 4 |
Journal | Journal of Physics and Chemistry of Solids |
Volume | 67 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 2006 Jan |
Keywords
- A. Superconductors
- D. Electrical properties
- D. Superconductivity
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics