Universal thermal conductivity in the vortex state of cuprate superconductors

被引：8
|
作者：
Franz, M [1 ]
Vafek, O
机构：
[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
来源：
PHYSICAL REVIEW B | 2001年 / 64卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.64.220501
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We formulate an effective low-energy theory for the fermionic excitations in d-wave superconductors in the presence of periodic vortex lattices. These can be modeled by an effective free Dirac Hamiltonian with renormalized velocities and possibly a small mass term. In the presence of random nonmagnetic impurities this will result in universal (i.e., field and disorder strength independent) thermal and spin conductivities with values different from those occurring in the Meissner state.
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页数：4
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