Half-filled Hubbard model on a Bethe lattice with next-nearest-neighbor hopping

被引：15
|
作者：
Peters, Robert [1 ]
Pruschke, Thomas [1 ]
机构：
[1] Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 04期
关键词：
antiferromagnetic materials; Hubbard model; metal-insulator transition; Neel temperature; paramagnetic-antiferromagnetic transitions; paramagnetism; vanadium compounds; MEAN-FIELD THEORY; RENORMALIZATION-GROUP; INSULATOR; METAL; TRANSITION; SYSTEMS; ANTIFERROMAGNETISM; SUPERCONDUCTIVITY; FERROMAGNETISM; FRUSTRATION;
D O I：
10.1103/PhysRevB.79.045108
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the interplay between Neel antiferromagnetism and the paramagnetic metal-insulator transition (PMIT) on a Bethe lattice with nearest- and next-nearest-neighbor hoppings t(1) and t(2). We concentrate in this paper on the situation at half-filling. For t(2)/t(1)-> 1 the PMIT outgrows the antiferromagnetic phase and shows a scenario similar to V2O3. In this parameter regime we also observe another magnetic phase.
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页数：7
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