期刊论文详细信息
Pairing correlations in a generalized Hubbard model for the cuprates | |
Article | |
关键词: T-J MODEL; HIGH-TEMPERATURE SUPERCONDUCTORS; FERMI-LIQUID; T-C(MAX); FLUCTUATIONS; TRANSITION; HOLES; | |
DOI : 10.1103/PhysRevB.61.9686 | |
来源: SCIE |
【 摘 要 】
Using numerical diagonalization of a 4x4 cluster, we calculate on-site s, extended-s, and d(x2-y2) pairing correlation functions (PCF's) in an effective generalized Hubbard model for the cuprates, with nearest-neighbor correlated hopping and next-nearest-neighbor hopping t'. The vertex contributions to the PCF's are significantly enhanced, relative to the t-t'-U model. The behavior of the PCF's and their vertex contributions, and signatures of anomalous flux quantization, indicate superconductivity in the d-wave channel for moderate doping and in the s-wave channel for high doping and small U.【 授权许可】
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