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On the influence of vibronic structural fluctuations on superconductivity in a two-band model

✍ Scribed by N. Kristoffel

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
372 KB
Volume
250
Category
Article
ISSN
0921-4534

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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 +