Superconducting order from disorder in 2H-TaSe2-xSx

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

doi:10.1038/s41535-017-0016-9

Title: Superconducting order from disorder in 2H-TaSe_2-xS_x

Journal Article · Fri Feb 24 00:00:00 EST 2017 · npj Quantum Materials

DOI:https://doi.org/10.1038/s41535-017-0016-9· OSTI ID:1351729

Li, Lijun ^[1]; Deng, Xiaoyu ^[2]; Wang, Zhen ^[3]; Liu, Yu ^[3]; Abeykoon, Milinda ^[4]; Dooryhee, Eric ^[4]; Tomic, Aleksandra ^[5]; Huang, Yanan ^[3]; Warren, John B. ^[6]; Bozin, Emil S. ^[3]; Billinge, Simon J. L. ^[7]; Sun, Yuping ^[8]; Zhu, Yimei ^[3]; Kotliar, Gabriel ^[9]; Petrovic, Cedomir ^[3]

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
Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics & Astronomy
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Brookhaven National Lab. (BNL), Upton, NY (United States)
Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
Brookhaven National Lab. (BNL), Upton, NY (United States). Instrumentation Division
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
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.
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

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-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.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704; 11404342

OSTI ID:: 1351729

Report Number(s):: BNL-113715-2017-JA

Journal Information:: npj Quantum Materials, Vol. 2, Issue 1; ISSN 2397-4648

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 57 works

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Superconductivity in tantalum self-intercalated 4 Ha -Ta _1.03 Se ₂ Bai, Hua; Wang, Mengmeng; Yang, Xiaohui Journal of Physics: Condensed Matter, Vol. 30, Issue 9 https://doi.org/10.1088/1361-648x/aaaa98	journal	February 2018
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Title: Superconducting order from disorder in 2H-TaSe_2-xS_x