Abstract
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.
Original language | English |
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Pages (from-to) | 47-49 |
Number of pages | 3 |
Journal | Journal of Physics and Chemistry of Solids |
Volume | 67 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 2006 Jan |
Keywords
- D. Superconductivity
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics