Microscopic theory of vortex pinning: Impurity terms in the Ginzburg-Landau free energy

被引:13
作者
Friesen, M
Muzikar, P
机构
[1] Department of Physics, Purdue University, West Lafayette
来源
PHYSICAL REVIEW B | 1996年 / 53卷 / 18期
关键词
D O I
10.1103/PhysRevB.53.R11953
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the presence of a single impurity, the Ginzburg-Landau free-energy functional for a superconductor acquires extra terms. Using microscopic theory, we determine the structure of these terms and their coefficients. Our calculation is very general: we assume a (k) over cap-dependent order parameter Delta((k) over cap), which transforms according to any one-dimensional irreducible representation of the crystalline point group. This representation may be conventional or unconventional, as appropriate to the current models of high-T-c superconductors. We treat an arbitrary Fermi surface. The physical significance of the theory is discussed, with emphasis on vortex pinning. We estimate the pinning energy of a single vortex.
引用
收藏
页码:11953 / 11956
页数:4
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