SUPERCONDUCTOR-INSULATOR PHASE-TRANSITION IN THE BOSON HUBBARD-MODEL

被引：79
|
作者：
KAMPF, AP
ZIMANYI, GT
机构：
[1] UNIV CALIF SANTA BARBARA, INST THEORET PHYS, SANTA BARBARA, CA 93106 USA
[2] UNIV CALIF DAVIS, DEPT PHYS, DAVIS, CA 95616 USA
来源：
PHYSICAL REVIEW B | 1993年 / 47卷 / 01期
关键词：
D O I：
10.1103/PhysRevB.47.279
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the superconductor-insulator phase transition in the two-dimensional boson Hubbard system with short-range interactions. Fluctuations of both the phase and the amplitude of the superfluid order parameter are included in the determination of the phase diagram at zero and finite temperatures. The mean-field phase boundary is compared to quantum Monte Carlo results. We also calculate the frequency-dependent conductivity in the vicinity of the phase transition and find it universal at the multicritical point.
引用
收藏
页码：279 / 286
页数：8
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