Two results on the Hubbard model

作者: Gang Su

DOI: 10.1016/0375-9601(96)00551-8

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摘要: Abstract In the simple single-band Hubbard model with finite Coulomb interaction, we show that ferromagnetic long-range order is absent for less than half-filling at temperatures on a bipartite lattice in thermodynamic limit. The nonexistence of off-diagonal on-site electron pairs also shown translation-invariant case. results are independent sign interaction.

参考文章(32)
Chen Ning Yang, η pairing and off-diagonal long-range order in a Hubbard model Physical Review Letters. ,vol. 63, pp. 2144- 2147 ,(1989) , 10.1103/PHYSREVLETT.63.2144
Kenn Kubo, Tatsuya Kishi, Rigorous bounds on the susceptibilities of the Hubbard model Physical Review B. ,vol. 41, pp. 4866- 4868 ,(1990) , 10.1103/PHYSREVB.41.4866
Shun-Qing Shen, Zhao-Ming Qiu, Exact demonstration of off-diagonal long-range order in the ground state of a Hubbard model. Physical Review Letters. ,vol. 71, pp. 4238- 4240 ,(1993) , 10.1103/PHYSREVLETT.71.4238
Andreas Mielke, Ferromagnetism in the Hubbard model and Hund's rule Physics Letters A. ,vol. 174, pp. 443- 448 ,(1993) , 10.1016/0375-9601(93)90207-G
Michael Aizenman, Elliott H. Lieb, Magnetic properties of some itinerant-electron systems at T>0. Physical Review Letters. ,vol. 65, pp. 1470- 1473 ,(1990) , 10.1103/PHYSREVLETT.65.1470
Tohru Koma, Hal Tasaki, Symmetry breaking in Heisenberg antiferromagnets Communications in Mathematical Physics. ,vol. 158, pp. 191- 214 ,(1993) , 10.1007/BF02097237
Andreas Mielke, Hal Tasaki, Ferromagnetism in the Hubbard model. Examples from models with degenerate single-electron ground states Communications in Mathematical Physics. ,vol. 158, pp. 341- 371 ,(1993) , 10.1007/BF02108079