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Title: Creating superconductivity in WB2 through pressure-induced metastable planar defects

Abstract

High-pressure electrical resistivity measurements reveal that the mechanical deformation of ultra-hard WB2 during compression induces superconductivity above 50 GPa with a maximum superconducting critical temperature, Tc of 17 K at 91 GPa. Upon further compression up to 187 GPa, the Tc gradually decreases. Theoretical calculations show that electron-phonon mediated superconductivity originates from the formation of metastable stacking faults and twin boundaries that exhibit a local structure resembling MgB2 (hP3, space group 191, prototype AlB2). Synchrotron x-ray diffraction measurements up to 145 GPa show that the ambient pressure hP12 structure (space group 194, prototype WB2) continues to persist to this pressure, consistent with the formation of the planar defects above 50 GPa. The abrupt appearance of superconductivity under pressure does not coincide with a structural transition but instead with the formation and percolation of mechanically-induced stacking faults and twin boundaries. The results identify an alternate route for designing superconducting materials.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]
  1. Univ. of Florida, Gainesville, FL (United States)
  2. Univ. of Illinois, Chicago, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of Alabama, Birmingham, AL (United States)
Publication Date:
Research Org.:
Univ. of Illinois, Chicago, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1906641
Grant/Contract Number:  
NA0003975; SC0020385; NA0003916; FG02-94ER14466; AC02-06CH11357; PHY-1549132; DMR-2118718; DMR-1933622; DMR-2119308; EAR-1606856; EAR-1634415; DMR-1453752
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 13; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Lim, J., Hire, A. C., Quan, Y., Kim, J. S., Xie, S. R., Sinha, S., Kumar, R. S., Popov, D., Park, C., Hemley, R. J., Vohra, Y. K., Hamlin, J. J., Hennig, R. G., Hirschfeld, P. J., and Stewart, G. R. Creating superconductivity in WB2 through pressure-induced metastable planar defects. United States: N. p., 2022. Web. doi:10.1038/s41467-022-35191-8.
Lim, J., Hire, A. C., Quan, Y., Kim, J. S., Xie, S. R., Sinha, S., Kumar, R. S., Popov, D., Park, C., Hemley, R. J., Vohra, Y. K., Hamlin, J. J., Hennig, R. G., Hirschfeld, P. J., & Stewart, G. R. Creating superconductivity in WB2 through pressure-induced metastable planar defects. United States. https://doi.org/10.1038/s41467-022-35191-8
Lim, J., Hire, A. C., Quan, Y., Kim, J. S., Xie, S. R., Sinha, S., Kumar, R. S., Popov, D., Park, C., Hemley, R. J., Vohra, Y. K., Hamlin, J. J., Hennig, R. G., Hirschfeld, P. J., and Stewart, G. R. Thu . "Creating superconductivity in WB2 through pressure-induced metastable planar defects". United States. https://doi.org/10.1038/s41467-022-35191-8. https://www.osti.gov/servlets/purl/1906641.
@article{osti_1906641,
title = {Creating superconductivity in WB2 through pressure-induced metastable planar defects},
author = {Lim, J. and Hire, A. C. and Quan, Y. and Kim, J. S. and Xie, S. R. and Sinha, S. and Kumar, R. S. and Popov, D. and Park, C. and Hemley, R. J. and Vohra, Y. K. and Hamlin, J. J. and Hennig, R. G. and Hirschfeld, P. J. and Stewart, G. R.},
abstractNote = {High-pressure electrical resistivity measurements reveal that the mechanical deformation of ultra-hard WB2 during compression induces superconductivity above 50 GPa with a maximum superconducting critical temperature, Tc of 17 K at 91 GPa. Upon further compression up to 187 GPa, the Tc gradually decreases. Theoretical calculations show that electron-phonon mediated superconductivity originates from the formation of metastable stacking faults and twin boundaries that exhibit a local structure resembling MgB2 (hP3, space group 191, prototype AlB2). Synchrotron x-ray diffraction measurements up to 145 GPa show that the ambient pressure hP12 structure (space group 194, prototype WB2) continues to persist to this pressure, consistent with the formation of the planar defects above 50 GPa. The abrupt appearance of superconductivity under pressure does not coincide with a structural transition but instead with the formation and percolation of mechanically-induced stacking faults and twin boundaries. The results identify an alternate route for designing superconducting materials.},
doi = {10.1038/s41467-022-35191-8},
journal = {Nature Communications},
number = 1,
volume = 13,
place = {United States},
year = {Thu Dec 22 00:00:00 EST 2022},
month = {Thu Dec 22 00:00:00 EST 2022}
}

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