Mesoscopic charge density wave in a magnetic flux

被引：16

作者：

Montambaux, G ^{[1
]}

机构：

[1] Univ Paris Sud, CNRS, Phys Solides Lab, F-91405 Orsay, France

来源：

EUROPEAN PHYSICAL JOURNAL B | 1998年 / 1卷 / 03期

关键词：

D O I：

10.1007/s100510050197

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The stability of a Charge Density Wave (CDW) in a one-dimensional ring pierced by a Aharonov-Bohm flux is studied in a mean-field picture. It is found that the stability depends on the parity of the number N of electrons. When the size of the ring becomes as small as the coherence length xi, the CDW gap increases for even N and decreases for odd N. Then when N is even, the CDW gap decreases with flux but it increases when N is odd. The variation of the BCS ratio with size and flux is also calculated. We derive the harmonics expansion of the persistent current in a presence of a finite gap.

引用

页码：377 / 383

页数：7

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