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Title: Superconducting order from disorder in 2H-TaSe 2-xS x

Here, we report on the emergence of robust superconducting order in single crystal alloys of TaSe 2$ -$x S x (0 ≤ × ≤2). The critical temperature of the alloy is surprisingly higher than that of the two end compounds TaSe2 and TaS2. The evolution of superconducting critical temperature T c(x) correlates with the full width at half maximum of the Bragg peaks and with the linear term of the high-temperature resistivity. The conductivity of the crystals near the middle of the alloy series is higher or similar than that of either one of the end members 2H-TaSe 2 and/or 2H-TaS 2. It is known that in these materials superconductivity is in close competition with charge density wave order. We interpret our experimental findings in a picture where disorder tilts this balance in favor of superconductivity by destroying the charge density wave order.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [4] ;  [5] ;  [3] ;  [6] ;  [3] ;  [7] ;  [8] ;  [3] ;  [9] ;  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Chinese Academy of Sciences (CAS), Hefei (China). Key Lab. of Materials Physics, Inst. of Solid State Physics
  2. Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics & Astronomy
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Instrumentation Division
  7. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  8. Chinese Academy of Sciences (CAS), Hefei (China). Key Lab. of Materials Physics, Inst. of Solid State Physics; Chinese Academy of Sciences (CAS), Beijing (China). High Magnetic Field Lab.
  9. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics & Astronomy
Publication Date:
Report Number(s):
BNL-113715-2017-JA
Journal ID: ISSN 2397-4648
Grant/Contract Number:
SC0012704; 11404342
Type:
Accepted Manuscript
Journal Name:
npj Quantum Materials
Additional Journal Information:
Journal Volume: 2; Journal Issue: 1; Journal ID: ISSN 2397-4648
Publisher:
Nature Publishing Group
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE
OSTI Identifier:
1351729

Li, Lijun, Deng, Xiaoyu, Wang, Zhen, Liu, Yu, Abeykoon, Milinda, Dooryhee, Eric, Tomic, Aleksandra, Huang, Yanan, Warren, John B., Bozin, Emil S., Billinge, Simon J. L., Sun, Yuping, Zhu, Yimei, Kotliar, Gabriel, and Petrovic, Cedomir. Superconducting order from disorder in 2H-TaSe2-xSx. United States: N. p., Web. doi:10.1038/s41535-017-0016-9.
Li, Lijun, Deng, Xiaoyu, Wang, Zhen, Liu, Yu, Abeykoon, Milinda, Dooryhee, Eric, Tomic, Aleksandra, Huang, Yanan, Warren, John B., Bozin, Emil S., Billinge, Simon J. L., Sun, Yuping, Zhu, Yimei, Kotliar, Gabriel, & Petrovic, Cedomir. Superconducting order from disorder in 2H-TaSe2-xSx. United States. doi:10.1038/s41535-017-0016-9.
Li, Lijun, Deng, Xiaoyu, Wang, Zhen, Liu, Yu, Abeykoon, Milinda, Dooryhee, Eric, Tomic, Aleksandra, Huang, Yanan, Warren, John B., Bozin, Emil S., Billinge, Simon J. L., Sun, Yuping, Zhu, Yimei, Kotliar, Gabriel, and Petrovic, Cedomir. 2017. "Superconducting order from disorder in 2H-TaSe2-xSx". United States. doi:10.1038/s41535-017-0016-9. https://www.osti.gov/servlets/purl/1351729.
@article{osti_1351729,
title = {Superconducting order from disorder in 2H-TaSe2-xSx},
author = {Li, Lijun and Deng, Xiaoyu and Wang, Zhen and Liu, Yu and Abeykoon, Milinda and Dooryhee, Eric and Tomic, Aleksandra and Huang, Yanan and Warren, John B. and Bozin, Emil S. and Billinge, Simon J. L. and Sun, Yuping and Zhu, Yimei and Kotliar, Gabriel and Petrovic, Cedomir},
abstractNote = {Here, we report on the emergence of robust superconducting order in single crystal alloys of TaSe2$ -$x Sx (0 ≤ × ≤2). The critical temperature of the alloy is surprisingly higher than that of the two end compounds TaSe2 and TaS2. The evolution of superconducting critical temperature Tc(x) correlates with the full width at half maximum of the Bragg peaks and with the linear term of the high-temperature resistivity. The conductivity of the crystals near the middle of the alloy series is higher or similar than that of either one of the end members 2H-TaSe2 and/or 2H-TaS2. It is known that in these materials superconductivity is in close competition with charge density wave order. We interpret our experimental findings in a picture where disorder tilts this balance in favor of superconductivity by destroying the charge density wave order.},
doi = {10.1038/s41535-017-0016-9},
journal = {npj Quantum Materials},
number = 1,
volume = 2,
place = {United States},
year = {2017},
month = {2}
}