Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9841732 | Physica C: Superconductivity and its Applications | 2005 | 6 Pages |
Abstract
With the insulating phase of κ-(BEDT-TTF)2X in mind, we study a t-J model on an anisotropic triangular lattice, where the hopping integral is tâ² in one of the three directions, using a variational Monte Carlo method. By changing the value of tâ²/t, we study the stability of superconducting (SC) states with d- and d + id-wave symmetries and of an antiferromagnetic (AF) state. As tâ²/t decreases from 1, the stable state immediately switches from the d + id wave to the d wave. The AF state is stabilized from the normal spin liquid state for tâ²/t â²Â 0.7 at half filling. We also take account of Nagaoka ferromagnetism and a phase separation.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Tsutomu Watanabe, Hisatoshi Yokoyama, Yukio Tanaka, Jun-ichiro Inoue, Masao Ogata,