Superconductor to spin-density-wave transition in quasi-one-dimensional metals with Ising anisotropy
Superconductor to spin-density-wave transition in quasi-one-dimensional metals with Ising anisotropy
复制标题
具有伊辛各向异性的准一维金属中的超导体到自旋密度波跃迁
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Millis
中科院分区：
文献类型：
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作者：
A. Rozhkov;A. Millis
本文研究了具有伊辛各向异性的准一维材料的超导机制。在一个孤立的链伊辛各向异性打开一个自旋间隙，如果链间耦合是足够弱，单粒子跳跃被抑制和耦合链的物理控制对跳跃和交换相互作用之间的竞争。自旋密度波和三重态超导相被发现分离的一级相变。对于特定的参数值，发现了SO（4）对称性描述的二级跃迁。
We study a mechanism for superconductivity in quasi-one-dimensional materials with Ising anisotropy. In an isolated chain Ising anisotropy opens a spin gap; if interchain coupling is sufficiently weak, single particle hopping is suppressed and the physics of coupled chains is controlled by a competition between pair hopping and exchange interaction. Spin-density-wave and triplet superconductivity phases are found separated by a first-order phase transition. For particular parameter values a second-order transition described by SO(4) symmetry is found.