Dislocations and vortices in pair-density-wave superconductors

被引：186

作者：

Agterberg, D. F. ^{[1
,2
]}

Tsunetsugu, H. ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[2] Univ Wisconsin, Dept Phys, Milwaukee, WI 53211 USA

来源：

NATURE PHYSICS | 2008年 / 4卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1038/nphys999

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

With the groundbreaking work of Fulde, Ferrell, Larkin and Ovchinnikov, it was realized that superconducting order can also break translational invariance, leading to a phase in which the Cooper pairs develop a coherent periodic spatially oscillating structure. Such pair-density-wave (PDW) superconductivity has become relevant in a diverse range of systems, including cuprates, organic superconductors, heavy-fermion superconductors, cold atoms and high-density quark matter. Here we show that, in addition to charge-density-wave (CDW) order, there are PDW ground states that induce spin-density-wave (SDW) order when there is no applied magnetic field. Furthermore, we show that PDW phases support topological defects that combine dislocations in the induced CDW/SDW order with a fractional vortex in the usual superconducting order. These defects provide a mechanism for fluctuation-driven non-superconducting CDW/SDW phases and conventional vortices with CDW/SDW order in the core.

引用

页码：639 / 642

页数：4

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