首页> 外文期刊>Physical review >Type-1.5 superconductivity in multiband systems: Effects of interband couplings
【24h】

Type-1.5 superconductivity in multiband systems: Effects of interband couplings

机译:多频带系统中的1.5型超导性:带间耦合的影响

获取原文
获取原文并翻译 | 示例
           

摘要

In contrast to single-component superconductors, which are described at the level of Ginzburg-Landau theory by a single parameter k and are divided in type-I k < 1/1/2 and type-II k > l/1/2 classes, two-component systems in general possess three fundamental length scales and have been shown to possess a separate "type-1.5" superconducting state. In that state, as a consequence of the extra fundamental length scale, vortices attract one another at long range but repel at shorter ranges, and therefore should form clusters in low magnetic fields. In this work we investigate the appearance of type-1.5 superconductivity and the interpretation of the fundamental length scales in the case of two active bands with substantial interband couplings such as intrinsic Josephson coupling, mixed gradient coupling, and density-density interactions. We show that in the presence of substantial intercomponent interactions of the above types the system supports type-1.5 superconductivity with fundamental length scales being associated with the mass of the gauge field and two masses of normal modes represented by mixed combinations of the density fields.
机译:与单组分超导体相反,后者在Ginzburg-Landau理论层面由单个参数k描述,并分为I k <1/1/2型和II k> l / 1/2类通常,两组分系统具有三个基本的长度尺度,并已显示具有单独的“ 1.5型”超导状态。在这种状态下,由于存在额外的基本长度尺度,涡旋在长距离处相互吸引,但在较短的距离处相互排斥,因此应在低磁场中形成簇。在这项工作中,我们研究了1.5条超导性的出现,以及在两个有效带之间存在大量带间耦合(例如固有的约瑟夫森耦合,混合梯度耦合和密度-密度相互作用)的情况下对基本长度尺度的解释。我们表明,在上述类型之间存在实质性的组件间相互作用时,系统支持1.5型超导性,其基本长度尺度与标距场的质量以及由密度场的混合组合表示的两个正常模式的质量相关。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号