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Title: Effect of proton irradiation on superconductivity in optimally doped BaFe 2 ( As 1 - x P x ) 2 single crystals

Journal Article · · Physical Review B
 [1];  [1];  [1];  [1];  [2];  [2];  [1];  [3];  [1];  [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Northern Illinois, DeKalb, IL (United States). Dept. of Physics
  3. Western Michigan Univ., Kalamazoo MI (United States). Dept. of Physics

Irradiation with 4-MeV protons was used to systematically introduce defects in single crystals of the iron- arsenide superconductor BaFe2(As1-xPx)2, x=0.33. The effect of disorder was investigated on the low temperature behavior of the London penetration depth, y(T) and transition temperature, Tc. In near-optimal doped samples with Tc ~ 29 K, signatures of gap with nodes were observed. Our results suggest that the nature of defects created by proton irradiation differs from electron irradiation. Contrary to other reports, we do not see a disorder driven lifting of accidental nodes, and we observe that proton induced defects are weaker pairbreakers than electron induced defects.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Contributing Organization:
Univ. of Northern Illinois, DeKalb, IL (United States); Western Michigan Univ., Kalamazoo MI (United States)
Grant/Contract Number:
AC02-06CH11357; AC05-00OR22725
OSTI ID:
1339258
Alternate ID(s):
OSTI ID: 1242597; OSTI ID: 1279437; OSTI ID: 1356851
Journal Information:
Physical Review B, Vol. 93, Issue 11; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (7)

Disorder raises the critical temperature of a cuprate superconductor journal May 2019
Clean to dirty limit and T c suppression in NdFeAsO 0.7 F 0.3 studied by H c2 analysis journal February 2018
Using electron irradiation to probe iron-based superconductors journal May 2018
c -axis superconducting performance enhancement in Co-doped Ba122 thin films by an artificial pinning center design journal November 2019
Anomalous sharp peak in the London penetration depth induced by the nodeless-to-nodal superconducting transition in BaFe 2 ( As 1 x P x ) 2 journal October 2019
Using electron irradiation to probe iron - based superconductors text January 2018
Disorder raises the critical temperature of a cuprate superconductor text January 2018

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