Effect of heavy-ion irradiation on London penetration depth in over-doped Ba(Fe,Co)2As2 release_fyqhhypxfrf2bl2azaqmpgln3a

by J. Murphy, M. A. Tanatar, Hyunsoo Kim, W. Kwok, U. Welp, D. Graf, J. S. Brooks, S. L. Bud'ko, P. C. Canfield, R. Prozorov

Released as a article .

2013  

Abstract

Irradiation with 1.4 GeV ^208Pb ions was used to induce artificial disorder in single crystals of iron-arsenide superconductor Ba(Fe_1-xCo_x)_2As_2 and to study its effect on the temperature-dependent London penetration depth and transport properties. Study was undertaken on overdoped single crystals with x=0.108 and x=0.127 characterized by notable modulation of the superconducting gap. Irradiation with doses 2.22×10^11d/cm^2 and 2.4×10^11d/cm^2, corresponding to the matching fields of B_ϕ = 6 T and 6.5 T, respectively, suppresses the superconducting T_c by approximately 0.3 to 1 K. The variation of the low-temperature penetration depth in both pristine and irradiated samples is well described by the power-law, Δλ (T)=AT^n. Irradiation increases the magnitude of the pre-factor A and decreases the exponent n, similar to the effect of irradiation in optimally doped samples. This finding supports universal s_± pairing in Ba(Fe_1-xCo_x)_2As_2 compounds for the whole Co doping range.
In text/plain format

Archived Files and Locations

application/pdf  636.8 kB
file_t2ee4hps4jfl7g2mkjqavlkqda
arxiv.org (repository)
web.archive.org (webarchive)
Read Archived PDF
Preserved and Accessible
Type  article
Stage   submitted
Date   2013-08-02
Version   v1
Language   en ?
arXiv  1308.0537v1
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: 9e6e61ae-432c-448c-b004-f4c1873794a7
API URL: JSON