Charge order and superconductivity in a two-dimensional triangular lattice at n=2/3

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dc.creatorWatanabe, Hiroshi
dc.creatorOgata, Masao
dc.date2005-07-14
dc.date2005-07-19
dc.date.accessioned2026-07-07T06:22:40Z
dc.date.available2026-07-07T06:22:40Z
dc.descriptionTo investigate the possibility of charge order and superconductivity in a doped two-dimensional triangular lattice, we study the extended Hubbard model with variational Monte Carlo method. At n=2/3, a commensurate filling for a triangular lattice, it is shown that the nearest-neighbor Coulomb interaction V induces honeycomb-type charge order and antiferromagnetic spin order at U>10t. We also discuss the possibility of superconductivity induced by charge fluctuation and the relation to the superconductivity in Na_{0.35}CoO_{2}1.3H_{2}O and theta-type organic condoctors.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0507330
dc.identifierhttp://arxiv.org/abs/cond-mat/0507330
dc.identifierJ. Phys. Soc. Jpn. 74 (2005) 2901
dc.identifierdoi:10.1143/JPSJ.74.2901
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95978
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleCharge order and superconductivity in a two-dimensional triangular lattice at n=2/3
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