TY - JOUR
T1 - Stability of superconductivity and antiferromagnetism in two-dimensional Hubbard model with diagonal transfer
AU - Yokoyama, Hisatoshi
AU - Tanaka, Yukio
AU - Ogata, Masao
PY - 2006/1/1
Y1 - 2006/1/1
N2 - Using an optimization variational Monte Carlo method, we study the effect of diagonal transfer t′ in a two-dimensional Hubbard model on stability of d-wave superconductivity (SC) and antiferromagnetism (AF). For hole doping (t′/t<0), the condensation energy of SC is enhanced by a couple of times, while that of AF rapidly decreases with increasing |t′/t|, and AF itself is intrinsically unstable for t′/t≲0. For electron doping (t′/t>0), conversely, SC tends to be suppressed, whereas the AF state not only comes to have a low energy but recovers the intrinsic stability. These results well explain various aspects of cuprate superconductors.
AB - Using an optimization variational Monte Carlo method, we study the effect of diagonal transfer t′ in a two-dimensional Hubbard model on stability of d-wave superconductivity (SC) and antiferromagnetism (AF). For hole doping (t′/t<0), the condensation energy of SC is enhanced by a couple of times, while that of AF rapidly decreases with increasing |t′/t|, and AF itself is intrinsically unstable for t′/t≲0. For electron doping (t′/t>0), conversely, SC tends to be suppressed, whereas the AF state not only comes to have a low energy but recovers the intrinsic stability. These results well explain various aspects of cuprate superconductors.
KW - D. Superconductivity
UR - http://www.scopus.com/inward/record.url?scp=33645059744&partnerID=8YFLogxK
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U2 - 10.1016/j.jpcs.2005.10.024
DO - 10.1016/j.jpcs.2005.10.024
M3 - Article
AN - SCOPUS:33645059744
VL - 67
SP - 47
EP - 49
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
IS - 1-3
ER -