Stability ofs+id-Wave Pairing State in the 2-D Extended Hubbard Model
Hiroki Tsuchiura, Yukio Tanaka, Yasunari Ushijima
Coexistence of the s and d x 2 - y 2 -wave ( d -wave) pairing is investigated in the two-dimensional (2-D) extended Hubbard model with on-site repulsive and inter-site attractive interactions using the mean-field approximation at T=0 K. The next-nearest-neighbor hopping effect can induce the coexistence of the s and d-wave pairing. It is found that in such a case, s + i d -wave pairing state becomes most stable.
Journal of the Physical Society of Japan•Mar 15, 1995•6 citations