London penetration depth and strong pair breaking in iron-based superconductors

被引：50

作者：

Gordon, R. T. ^{[1
]}

Kim, H.

Tanatar, M. A.

Prozorov, R.

Kogan, V. G.

机构：

[1] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 18期

关键词：

STATE;

D O I：

10.1103/PhysRevB.81.180501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low-temperature variation in the London penetration depth for a number of iron-pnictide and iron-chalcogenide superconductors is nearly quadratic, Delta lambda(T) = beta T(n) with n approximate to 2. The coefficient in this dependence shows a robust scaling, beta proportional to 1/T(c)(3) across different families of these materials. We associate the scaling with a strong pair breaking. The same mechanism has recently been suggested to explain the scalings of the specific-heat jump, Delta C proportional to T(c)(3) [Bud'ko et al., Phys. Rev. B 79, 220516 (R) (2009)], and the slopes of the upper critical field, dH(c2)/dT proportional to T(c) in these materials [Kogan, Phys. Rev. B 80, 214532 (2009)]. This suggests that thermodynamic and electromagnetic properties of the iron-based superconductors can be described within a strong pair-breaking scenario (this work).

引用

页数：4

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