期刊论文详细信息
Charged and spin-excitation gaps in half-filled strongly correlated electron systems: A rigorous result | |
Article | |
关键词: PERIODIC ANDERSON MODEL; GROUND-STATE; ANTIFERROMAGNETIC ORDER; HUBBARD-MODEL; SUPERCONDUCTIVITY; ENERGY; | |
DOI : 10.1103/PhysRevB.58.7612 | |
来源: SCIE |
【 摘 要 】
By exploiting the particle-hole symmetries of the Hubbard model, the periodic Anderson model, and the Kondo lattice model at half-filling and by applying a generalized version of Lieb's spin-reflection positivity method, we show that the char,oed gaps of these models are always larger than their spin-excitation gaps. This theorem confirms the previous results derived by either the variational approach or the density-matrix renormalization-group approach. [S0163-1829(98)07336-6].
【 授权许可】
Free