FLUX-QUANTIZATION IN RINGS FOR HUBBARD (ATTRACTIVE AND REPULSIVE) AND T-J-LIKE HAMILTONIANS

被引：16

作者：

FERRETTI, A ^{[1
]}

KULIK, IO ^{[1
]}

LAMI, A ^{[1
]}

机构：

[1] ACAD SCI UKSSR,INST LOW TEMP PHYS & ENGN,KHARKOV 310164,UKRAINE,USSR

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.45.5486

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ground-state energy of rings with 10 or 16 sites and 2 or 4 fermions (holes or electrons) is computed as a function of the flux phi created by a vector potential constant along the ring (Aharonov-Bohm setup) for three different model Hamiltonians: the attractive (U < 0) and repulsive (U > 0) Hubbard and a t-J-like Hamiltonian. In all cases the flux is found to be quantized in units hc/2e, showing that the charge carriers are pairs. The possible role of phonon fluctuations in discriminating among the different models is also investigated.

引用

页码：5486 / 5490

页数：5

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