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

Abstract

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.

Authors:
 [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
Publication Date:
Research Org.:
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 Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
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:  
AC02-06CH11357; AC05-00OR22725
Resource Type:
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., Mishra, V., Fang, L., Taddei, K. M., Chmaissem, O., Claus, H., Kayani, A., Snezhko, A., Welp, U., and Kwok, W. -K. 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., Mishra, V., Fang, L., Taddei, K. M., Chmaissem, O., Claus, H., Kayani, A., Snezhko, A., Welp, U., & Kwok, W. -K. Effect of proton irradiation on superconductivity in optimally doped BaFe2(As1-xPx)2 single crystals. United States. https://doi.org/10.1103/PhysRevB.93.115119
Smylie, M. P., Leroux, M., Mishra, V., Fang, L., Taddei, K. M., Chmaissem, O., Claus, H., Kayani, A., Snezhko, A., Welp, U., and Kwok, W. -K. Thu . "Effect of proton irradiation on superconductivity in optimally doped BaFe2(As1-xPx)2 single crystals". United States. https://doi.org/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 Mishra, V. and Fang, L. and Taddei, K. M. and Chmaissem, O. and Claus, H. and Kayani, A. and Snezhko, A. and Welp, U. and Kwok, W. -K.},
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 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.},
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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