TY - JOUR
T1 - Effect of next-nearest-neighbor transfer on superconductivity and antiferromagnetism in two-dimensional t-J model
AU - Watanabe, Tsutomu
AU - Yokoyama, Hisatoshi
AU - Tanaka, Yukio
AU - Inoue, Jun Ichiro
AU - Ogata, Masao
PY - 2006/1
Y1 - 2006/1
N2 - Effect of the diagonal transfer t′ in a square lattice is studied, by applying a variational Monte Carlo method to the t-J model. Condensation energy of d-wave superconductivity increases (decreases) for hole-doped cases, t′/t<0 (electron-doped cases, t′/t>0), whereas antiferromagnetism (AF) is suppressed (enhanced) for t′/t<0 (t′/t>0). Furthermore, the AF state off half filling is intrinsically unstable and phase separates for t′/t≲0, but stable even away from half filling for t′/t∼0.2. This result consistently explains recent experiments on the stability of the AF phases in cuprates.
AB - Effect of the diagonal transfer t′ in a square lattice is studied, by applying a variational Monte Carlo method to the t-J model. Condensation energy of d-wave superconductivity increases (decreases) for hole-doped cases, t′/t<0 (electron-doped cases, t′/t>0), whereas antiferromagnetism (AF) is suppressed (enhanced) for t′/t<0 (t′/t>0). Furthermore, the AF state off half filling is intrinsically unstable and phase separates for t′/t≲0, but stable even away from half filling for t′/t∼0.2. This result consistently explains recent experiments on the stability of the AF phases in cuprates.
KW - A. Superconductors
KW - D. Electrical properties
KW - D. Superconductivity
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U2 - 10.1016/j.jpcs.2005.10.009
DO - 10.1016/j.jpcs.2005.10.009
M3 - Article
AN - SCOPUS:33645018556
VL - 67
SP - 112
EP - 114
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
IS - 1-3
ER -