Vortex lattice in type II superconductors under magnetic field in the presence of inhomogeneities

被引：0

作者：

Rosenstein, B. ^{[1
,2
]}

Shapiro, B. Ya. ^{[3
]}

Zhuravlev, V. ^{[1
,2
]}

机构：

[1] Natl Chiao Tung Univ, Natl Ctr Theoret Studies, Hsinchu 30050, Taiwan

[2] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30050, Taiwan

[3] Bar Ilan Univ, Dept Phys, IL-52100 Ramat Gan, Israel

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2008年 / 468卷 / 7-10期

关键词：

vortex matter; shear modulus; peak effect;

D O I：

10.1016/j.physc.2007.11.091

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the structure, elastic and dynamical properties of the vortex matter in the presence of artificially created or intrinsic gradients of the critical temperature in the framework of the Ginzburg-Landau theory. The region of parameters in which vortex cores are not well separated is treated perturbatively in 1 - H-c2(T)IHc2(0). Critical current for periodic pinning potential is obtained and general expressions for elastic moduli at long wavelength are derived. We show that it is impossible to restrict the system to lowest Landau level. We use it to provide a theory of the discontinuous peak effect in critical current which appears near H-c2(T) line in low T-c strongly type II superconductors. Influence of thermal fluctuations is also considered and we find softening of the shear modulus in the vicinity of vortex lattice melting line. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：621 / 626

页数：6

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