Title
London penetration depth in Ba(Fe1-xTx)(2)As-2 (T=Co, Ni) superconductors irradiated with heavy ions
Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
8-1-2010
Journal or Book Title
Physical Review B
Volume
82
Issue
6
First Page
060518(R)
DOI
10.1103/PhysRevB.82.060518
Abstract
Irradiation with Pb ions was used to study the effect of disorder on the in-plane London penetration depth, λ(T), in single crystals of Ba(Fe1−xTx)2As2 (T=Co, Ni). An increase in the irradiation dose results in a monotonic decrease in the superconducting transition temperature, Tc, without affecting much the transition width. In both Co- and Ni-doped systems we find a power-law behavior, Δλ(T)∝Tn with the exponent n systematically decreasing with the increase in disorder. This observation, at qualitative odds with the response of s- and d-wave superconductors, finds natural explanation in a nodeless s± state with pairbreaking (interband) impurity scattering. We are able to describe the effect quantitatively assuming the pairbreaking strength intermediate between Born and unitary limits.
Copyright Owner
American Physical Society
Copyright Date
2010
Language
en
File Format
application/pdf
Recommended Citation
Kim, H.; Gordon, R. T.; Tanatar, Makariy A.; Hua, J.; Welp, U.; Kwok, W. K.; Ni, Ni; Bud’ko, Sergey L.; Canfield, Paul C.; Vorontsov, A. B.; and Prozorov, Ruslan, "London penetration depth in Ba(Fe1-xTx)(2)As-2 (T=Co, Ni) superconductors irradiated with heavy ions" (2010). Physics and Astronomy Publications. 696.
https://lib.dr.iastate.edu/physastro_pubs/696
Comments
This article is published as Kim, H., R. T. Gordon, M. A. Tanatar, J. Hua, U. Welp, W. K. Kwok, N. Ni, S. L. Bud’ko, P. C. Canfield, A. B. Vorontsov, and R. Prozorov. "London penetration depth in Ba (Fe 1− x T x) 2 As 2 (T= Co, Ni) superconductors irradiated with heavy ions." Physical Review B 82, no. 6 (2010): 060518(R). DOI: 10.1103/PhysRevB.82.060518. Posted with permission.