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

被引:51
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).
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共 28 条
[1]  
ABRIKOSOV AA, 1961, SOV PHYS JETP-USSR, V12, P1243
[2]  
[Anonymous], ARXIV09074399
[3]   Jump in specific heat at the superconducting transition temperature in Ba(Fe1-xCox)2As2 and Ba(Fe1-xNix)2As2 single crystals [J].
Bud'ko, Sergey L. ;
Ni, Ni ;
Canfield, Paul C. .
PHYSICAL REVIEW B, 2009, 79 (22)
[4]   Decoupling of the superconducting and magnetic/structural phase transitions in electron-doped BaFe2As2 [J].
Canfield, P. C. ;
Bud'ko, S. L. ;
Ni, Ni ;
Yan, J. Q. ;
Kracher, A. .
PHYSICAL REVIEW B, 2009, 80 (06)
[5]   TRANSFORMATION OF GORKOVS EQUATION FOR TYPE 2 SUPERCONDUCTORS INTO TRANSPORT-LIKE EQUATIONS [J].
EILENBERGER, G .
ZEITSCHRIFT FUR PHYSIK, 1968, 214 (02) :195-+
[6]   Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82 [J].
Fang, M. H. ;
Pham, H. M. ;
Qian, B. ;
Liu, T. J. ;
Vehstedt, E. K. ;
Liu, Y. ;
Spinu, L. ;
Mao, Z. Q. .
PHYSICAL REVIEW B, 2008, 78 (22)
[7]   Evidence for a Nodal-Line Superconducting State in LaFePO [J].
Fletcher, J. D. ;
Serafin, A. ;
Malone, L. ;
Analytis, J. G. ;
Chu, J. -H. ;
Erickson, A. S. ;
Fisher, I. R. ;
Carrington, A. .
PHYSICAL REVIEW LETTERS, 2009, 102 (14)
[8]   Unconventional London Penetration Depth in Single-Crystal Ba(Fe0.93Co0.07)2As2 Superconductors [J].
Gordon, R. T. ;
Ni, N. ;
Martin, C. ;
Tanatar, M. A. ;
Vannette, M. D. ;
Kim, H. ;
Samolyuk, G. D. ;
Schmalian, J. ;
Nandi, S. ;
Kreyssig, A. ;
Goldman, A. I. ;
Yan, J. Q. ;
Bud'ko, S. L. ;
Canfield, P. C. ;
Prozorov, R. .
PHYSICAL REVIEW LETTERS, 2009, 102 (12)
[9]   London penetration depth in single crystals of Ba(Fe1-xCox)2As2 spanning underdoped to overdoped compositions [J].
Gordon, R. T. ;
Martin, C. ;
Kim, H. ;
Ni, N. ;
Tanatar, M. A. ;
Schmalian, J. ;
Mazin, I. I. ;
Bud'ko, S. L. ;
Canfield, P. C. ;
Prozorov, R. .
PHYSICAL REVIEW B, 2009, 79 (10)
[10]   Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density [J].
Hashimoto, K. ;
Shibauchi, T. ;
Kasahara, S. ;
Ikada, K. ;
Tonegawa, S. ;
Kato, T. ;
Okazaki, R. ;
van der Beek, C. J. ;
Konczykowski, M. ;
Takeya, H. ;
Hirata, K. ;
Terashima, T. ;
Matsuda, Y. .
PHYSICAL REVIEW LETTERS, 2009, 102 (20)