Superconductivity in the superhard boride WB4.2
Abstract
Here, we show that the superhard boride WB4.2 is a superconductor with a Tc of 2.05(5) K. Temperature-dependent magnetic susceptibility, electrical resistivity, and specific heat measurements were used to characterize the superconducting transition. The Sommerfeld constant gamma for WB4.2 is 2.07(3) mJ mol(-1) K-2 and the ΔC/γ Tc = 1.56, which is somewhat higher than what is expected for weakly coupled Bardeen-Cooper-Schrieffer type superconductors. The H c2 versus T plot is linear over a wide temperature range but does show signs of flattening by the lowest temperatures studied and therefore the zero temperature upper critical field (μ 0H c2(0)) for WB4.2 lies somewhere between the linear extrapolation of μ 0H c2(T) to 0 K and expectations based on the Werthamer-Helfand-Hohenberg model.
- Authors:
-
[1];
[3];
[2];
- Princeton Univ., NJ (United States)
- Gdansk Univ. of Technology (Poland)
- Polish Academy of Sciences, Wroclaw (Poland)
- Louisiana State Univ., Baton Rouge, LA (United States)
- Publication Date:
- Research Org.:
- Princeton Univ., NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1595074
- Grant/Contract Number:
- FG02-98ER45706; SC0012432; GBMF-4412; UMO-2016/22/M/ST5/00435
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Superconductor Science and Technology
- Additional Journal Information:
- Journal Volume: 31; Journal Issue: 11; Journal ID: ISSN 0953-2048
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superconductivity; superhard; tungsten deficient; boride
Citation Formats
Carnicom, Elizabeth M., Strychalska-Nowak, Judyta, Wiśniewski, P., Kaczorowski, D., Xie, W., Klimczuk, T., and Cava, R. J. Superconductivity in the superhard boride WB4.2. United States: N. p., 2018.
Web. doi:10.1088/1361-6668/aade5a.
Carnicom, Elizabeth M., Strychalska-Nowak, Judyta, Wiśniewski, P., Kaczorowski, D., Xie, W., Klimczuk, T., & Cava, R. J. Superconductivity in the superhard boride WB4.2. United States. https://doi.org/10.1088/1361-6668/aade5a
Carnicom, Elizabeth M., Strychalska-Nowak, Judyta, Wiśniewski, P., Kaczorowski, D., Xie, W., Klimczuk, T., and Cava, R. J. Thu .
"Superconductivity in the superhard boride WB4.2". United States. https://doi.org/10.1088/1361-6668/aade5a. https://www.osti.gov/servlets/purl/1595074.
@article{osti_1595074,
title = {Superconductivity in the superhard boride WB4.2},
author = {Carnicom, Elizabeth M. and Strychalska-Nowak, Judyta and Wiśniewski, P. and Kaczorowski, D. and Xie, W. and Klimczuk, T. and Cava, R. J.},
abstractNote = {Here, we show that the superhard boride WB4.2 is a superconductor with a Tc of 2.05(5) K. Temperature-dependent magnetic susceptibility, electrical resistivity, and specific heat measurements were used to characterize the superconducting transition. The Sommerfeld constant gamma for WB4.2 is 2.07(3) mJ mol(-1) K-2 and the ΔC/γ Tc = 1.56, which is somewhat higher than what is expected for weakly coupled Bardeen-Cooper-Schrieffer type superconductors. The H c2 versus T plot is linear over a wide temperature range but does show signs of flattening by the lowest temperatures studied and therefore the zero temperature upper critical field (μ 0H c2(0)) for WB4.2 lies somewhere between the linear extrapolation of μ 0H c2(T) to 0 K and expectations based on the Werthamer-Helfand-Hohenberg model.},
doi = {10.1088/1361-6668/aade5a},
journal = {Superconductor Science and Technology},
number = 11,
volume = 31,
place = {United States},
year = {Thu Sep 27 00:00:00 EDT 2018},
month = {Thu Sep 27 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
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