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Superconductivity due to charge fluctuation on a triangular lattice

✍ Scribed by Yasuhiro Tanaka; Yoichi Yanase; Masao Ogata


Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
174 KB
Volume
359-361
Category
Article
ISSN
0921-4526

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Stability of the superconducting state i
✍ Kenji Kobayashi; Hisatoshi Yokoyama πŸ“‚ Article πŸ“… 2006 πŸ› Elsevier Science 🌐 English βš– 194 KB

As a model of the novel superconductor Na x CoO 2 AE yH 2 O, we study a triangular Hubbard model with doubly degenerate atomic orbitals, using an optimization variational Monte Carlo method. It is found that when the isolated Fermi surface overlaps the van Hove singularity points, d x 2 Γ€y 2 and d +