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

Abstract

Irradiation with 4 MeV protons was used to systematically introduce defects in single crystals of the iron-arsenide superconductor BaFe 2(As 1-xP x) 2, x = 0.33. The effect of disorder on the low-temperature behavior of the London penetration depth λ(T) and transition temperature T c was investigated. In nearly optimally doped samples with T c ~ 29 K, signatures of a superconducting gap with nodes were observed. Contrary to previous reports on electron-irradiated crystals, we do not see a disorder-driven lifting of accidental nodes, and we observe that proton-induced defects are weaker pair breakers than electron-induced defects. Lastly, we attribute our findings to anisotropic electron scattering caused by proton irradiation defects.

Authors:
 [1];  [1];  [1];  [2];  [1];  [3];  [1];  [1];  [1];  [1];  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Northern Illinois, DeKalb, IL (United States)
  3. Western Michigan Univ., Kalamazoo, MI (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Contributing Org.:
Univ. of Northern Illinois, DeKalb, IL (United States); Western Michigan Univ., Kalamazoo MI (United States)
OSTI Identifier:
1339258
Alternate Identifier(s):
OSTI ID: 1242597; OSTI ID: 1279437; OSTI ID: 1356851
Grant/Contract Number:  
AC05-00OR22725; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 11; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Smylie, M. P., Leroux, M., Fang, L., Chmaissem, Omar H., Claus, H., Kayani, A., Snezhko, A., Welp, U., Kwok, W. -K., Mishra, V., and Taddei, K. M. Effect of proton irradiation on superconductivity in optimally doped BaFe2(As1-xPx)2 single crystals. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.115119.
Smylie, M. P., Leroux, M., Fang, L., Chmaissem, Omar H., Claus, H., Kayani, A., Snezhko, A., Welp, U., Kwok, W. -K., Mishra, V., & Taddei, K. M. Effect of proton irradiation on superconductivity in optimally doped BaFe2(As1-xPx)2 single crystals. United States. doi:10.1103/PhysRevB.93.115119.
Smylie, M. P., Leroux, M., Fang, L., Chmaissem, Omar H., Claus, H., Kayani, A., Snezhko, A., Welp, U., Kwok, W. -K., Mishra, V., and Taddei, K. M. Thu . "Effect of proton irradiation on superconductivity in optimally doped BaFe2(As1-xPx)2 single crystals". United States. doi:10.1103/PhysRevB.93.115119. https://www.osti.gov/servlets/purl/1339258.
@article{osti_1339258,
title = {Effect of proton irradiation on superconductivity in optimally doped BaFe2(As1-xPx)2 single crystals},
author = {Smylie, M. P. and Leroux, M. and Fang, L. and Chmaissem, Omar H. and Claus, H. and Kayani, A. and Snezhko, A. and Welp, U. and Kwok, W. -K. and Mishra, V. and Taddei, K. M.},
abstractNote = {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 on the low-temperature behavior of the London penetration depth λ(T) and transition temperature Tc was investigated. In nearly optimally doped samples with Tc ~ 29 K, signatures of a superconducting gap with nodes were observed. Contrary to previous reports on electron-irradiated crystals, we do not see a disorder-driven lifting of accidental nodes, and we observe that proton-induced defects are weaker pair breakers than electron-induced defects. Lastly, we attribute our findings to anisotropic electron scattering caused by proton irradiation defects.},
doi = {10.1103/PhysRevB.93.115119},
journal = {Physical Review B},
number = 11,
volume = 93,
place = {United States},
year = {Thu Mar 10 00:00:00 EST 2016},
month = {Thu Mar 10 00:00:00 EST 2016}
}

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Works referenced in this record:

Defect independence of the irreversibility line in proton-irradiated Y-Ba-Cu-O crystals
journal, August 1990

  • Civale, L.; Marwick, A. D.; McElfresh, M. W.
  • Physical Review Letters, Vol. 65, Issue 9, p. 1164-1167
  • DOI: 10.1103/PhysRevLett.65.1164

Structure and flux pinning properties of irradiation defects in YBa2Cu3O7-x
journal, January 1993


Doubling the critical current density of high temperature superconducting coated conductors through proton irradiation
journal, September 2013

  • Jia, Y.; LeRoux, M.; Miller, D. J.
  • Applied Physics Letters, Vol. 103, Issue 12, Article No. 122601
  • DOI: 10.1063/1.4821440