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Title: Normal state above the upper critical field in Fe 1 + y Te 1 - x ( Se , S ) x

Abstract

Here, we have investigated the magnetotransport above the upper critical field ( H c 2 ) in Fe 1.14 Te 0.7 Se 0.3 , Fe 1.02 Te 0.61 Se 0.39 , Fe 1.05 Te 0.89 Se 0.11 , and Fe 1.06 Te 0.86 S 0.14 . The μ SR measurements confirm electronic phase separation in Fe 1.06 Te 0.86 S 0.14 , similar to Fe 1 + y Te 1 - x Se x . We found that superconductivity is suppressed in high magnetic fields above 60 T, allowing us to gain insight into the normal-state properties below the zero-field superconducting transition temperature ( T c ). We also show that the resistivity of Fe 1.14 Te 0.7 Se 0.3 and Fe 1.02 Te 0.61 Se 0.39 above H c 2 is metallic as T → 0 , just like the normal-state resistivity above T c . On the other hand, the normal-state resistivity in Fe 1.05 Te 0.89 Se 0.11 and Fe 1.06 Te 0.86 S 0.14 is nonmetallic down to lowest temperatures, reflecting the superconductor-insulator transition due to electronic phase separation.

Authors:
 [1];  [2];  [3];  [3];  [1];  [3];  [4];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Helmholtz-Zentrum Berlin (HZB), (Germany). Hochfeld Magnetlabor Dresden (HLD-EMFL)
  3. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Lab. for Muon Spin Spectroscopy
  4. Helmholtz-Zentrum Berlin (HZB), (Germany). Hochfeld Magnetlabor Dresden (HLD-EMFL); Technical Univ. Dresden (Germany). Inst. for Solid State Physics
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1372446
Alternate Identifier(s):
OSTI ID: 1355072
Report Number(s):
BNL-114042-2017-JA
Journal ID: ISSN 2469-9950; PRBMDO; R&D Project: PM016; KC0201050; TRN: US1702670
Grant/Contract Number:
SC00112704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 18; 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

Citation Formats

Wang, Aifeng, Kampert, Erik, Saadaoui, H., Luetkens, H., Hu, Rongwei, Morenzoni, E., Wosnitza, J., and Petrovic, C. Normal state above the upper critical field in Fe1+yTe1-x(Se,S)x. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.184504.
Wang, Aifeng, Kampert, Erik, Saadaoui, H., Luetkens, H., Hu, Rongwei, Morenzoni, E., Wosnitza, J., & Petrovic, C. Normal state above the upper critical field in Fe1+yTe1-x(Se,S)x. United States. doi:10.1103/PhysRevB.95.184504.
Wang, Aifeng, Kampert, Erik, Saadaoui, H., Luetkens, H., Hu, Rongwei, Morenzoni, E., Wosnitza, J., and Petrovic, C. Wed . "Normal state above the upper critical field in Fe1+yTe1-x(Se,S)x". United States. doi:10.1103/PhysRevB.95.184504. https://www.osti.gov/servlets/purl/1372446.
@article{osti_1372446,
title = {Normal state above the upper critical field in Fe1+yTe1-x(Se,S)x},
author = {Wang, Aifeng and Kampert, Erik and Saadaoui, H. and Luetkens, H. and Hu, Rongwei and Morenzoni, E. and Wosnitza, J. and Petrovic, C.},
abstractNote = {Here, we have investigated the magnetotransport above the upper critical field ( H c 2 ) in Fe 1.14 Te 0.7 Se 0.3 , Fe 1.02 Te 0.61 Se 0.39 , Fe 1.05 Te 0.89 Se 0.11 , and Fe 1.06 Te 0.86 S 0.14 . The μ SR measurements confirm electronic phase separation in Fe 1.06 Te 0.86 S 0.14 , similar to Fe 1 + y Te 1 - x Se x . We found that superconductivity is suppressed in high magnetic fields above 60 T, allowing us to gain insight into the normal-state properties below the zero-field superconducting transition temperature ( T c ). We also show that the resistivity of Fe 1.14 Te 0.7 Se 0.3 and Fe 1.02 Te 0.61 Se 0.39 above H c 2 is metallic as T → 0 , just like the normal-state resistivity above T c . On the other hand, the normal-state resistivity in Fe 1.05 Te 0.89 Se 0.11 and Fe 1.06 Te 0.86 S 0.14 is nonmetallic down to lowest temperatures, reflecting the superconductor-insulator transition due to electronic phase separation.},
doi = {10.1103/PhysRevB.95.184504},
journal = {Physical Review B},
number = 18,
volume = 95,
place = {United States},
year = {Wed May 03 00:00:00 EDT 2017},
month = {Wed May 03 00:00:00 EDT 2017}
}

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