The superconductor-insulator transition in a Josephson junction chain with quantum fluctuation

被引：6
|
作者：
Chung, SG
机构：
[1] Department of Physics, Western Michigan University, Kalamazoo
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1997年 / 9卷 / 46期
关键词：
D O I：
10.1088/0953-8984/9/46/002
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The superconductor-insulator transition in a Josephson junction chain with quantum fluctuation is studied by a density matrix renormalization group. The critical Josephson coupling is found to be J(c) similar to 1.85, while the Villain approximation gives J(c) similar to 1.1. When extending the phase space from (0, 2 pi) to (0, 4 pi), corresponding to a very small quasi-particle tunnelling effect, the superconductor-insulator transition still exists but at a larger critical coupling J(c) similar to 2.3.
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页码：L619 / L623
页数：5
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