TY - JOUR
T1 - Charge order, spin order and superconductivity in two-dimensional electron systems
T2 - Effect of nearest-neighbor Coulomb interaction
AU - Watanabe, Hiroshi
AU - Ogata, M.
PY - 2006/5/1
Y1 - 2006/5/1
N2 - Motivated by the charge order (CO) and superconductivity (SC) in θ - ( ET )2 X salts, we study the extended Hubbard model in a two-dimensional triangular lattice with variational Monte Carlo method. We show that the nearest-neighbor Coulomb interaction V induces charge fluctuation and the 3-fold CO state is stabilized. We also discuss the possibility of next-nearest-neighbor f-wave SC induced by charge fluctuation.
AB - Motivated by the charge order (CO) and superconductivity (SC) in θ - ( ET )2 X salts, we study the extended Hubbard model in a two-dimensional triangular lattice with variational Monte Carlo method. We show that the nearest-neighbor Coulomb interaction V induces charge fluctuation and the 3-fold CO state is stabilized. We also discuss the possibility of next-nearest-neighbor f-wave SC induced by charge fluctuation.
KW - θ - ( ET ) X salts
KW - 3-fold charge order
KW - Charge fluctuation
KW - Next-nearest-neighbor f-wave superconductivity
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U2 - 10.1016/j.physb.2006.01.256
DO - 10.1016/j.physb.2006.01.256
M3 - Article
AN - SCOPUS:33646390096
VL - 378-380
SP - 569
EP - 570
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - SPEC. ISS.
ER -