...
首页> 外文期刊>Physical review >Thermal conductivity in the mixed state of a superconductor at low magnetic fields
【24h】

Thermal conductivity in the mixed state of a superconductor at low magnetic fields

机译:低磁场下超导体混合态的热导率

获取原文
获取原文并翻译 | 示例
           

摘要

We evaluate accurate low-field/low-temperature asymptotics of the thermal conductivity perpendicular to the magnetic field for one-band and two-band s-wave superconductors using the Keldysh-Usadel formalism. We show that heat transport in this regime is limited by tunneling of quasiparticles between adjacent vortices across a number of local points and therefore a widely used approximation of averaging over the circular unit cell is not valid. In the single-band case, we obtain a parameter-free analytical solution which provides a theoretical lower limit for heat transport in the mixed state. In the two-band case, we show that the heat transport is controlled by the ratio of gaps and diffusion constants in different bands. The presence of a weaker second band strongly enhances the thermal conductivity at low fields.
机译:我们使用Keldysh-Usadel形式论来评估一波段和两波段s波超导体与垂直于磁场的导热率的精确低场/低温渐近线。我们表明,在这种情况下的热传输受到跨多个局部点的相邻涡旋之间的准粒子隧穿的限制,因此,在圆形晶胞上平均使用的平均近似法无效。在单频带情况下,我们获得了无参数的解析解,该解析解为混合状态下的热传输提供了理论下限。在两波段的情况下,我们表明热传输受不同波段的间隙比和扩散常数的控制。较弱的第二谱带的存在极大地增强了低电场下的热导率。

著录项

  • 来源
    《Physical review》 |2011年第9期|p.094521.1-094521.6|共6页
  • 作者

    A. A. Golubov; A. E. Koshelev;

  • 作者单位

    Faculty of Science and Technology and MESA+ Institute of Nanotechnology, University of Twente, 7500 AE, Enschede, The Netherlands;

    Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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