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Title: Pressure-induced superconductivity in the giant Rashba system BiTeI

Abstract

We present that at ambient pressure, BiTeI exhibits a giant Rashba splitting of the bulk electronic bands. At low pressures, BiTeI undergoes a transition from trivial insulator to topological insulator. At still higher pressures, two structural transitions are known to occur. We have carried out a series of electrical resistivity and AC magnetic susceptibility measurements on BiTeI at pressure up to ~40 GPa in an effort to characterize the properties of the high-pressure phases. A previous calculation found that the high-pressure orthorhombic P4/nmm structure BiTeI is a metal. We find that this structure is superconducting with T c values as high as 6 K. AC magnetic susceptibility measurements support the bulk nature of the superconductivity. Using electronic structure and phonon calculations, we compute T c and find that our data is consistent with phonon-mediated superconductivity.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [1];  [5];  [1];  [1]
+ Show Author Affiliations
  1. Univ. of Florida, Gainesville, FL (United States). Department of Physics
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physics Division
  3. University of Alabama at Birmingham, Birmingham, AL (United States). Department of Physics
  4. Ecole Polytechnique Federale de Lausanne (Switzerland). Institute of Physics
  5. Univ. of Florida, Gainesville, FL (United States). Department of Materials Science
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1393356
Report Number(s):
LLNL-JRNL-707783
Journal ID: ISSN 0953-8984
Grant/Contract Number:  
AC52-07NA27344; FG02-05ER46236; NA0002928; FG02-86ER45268
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 29; Journal Issue: 9; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

VanGennep, D., Linscheid, A., Jackson, D. E., Weir, S. T., Vohra, Y. K., Berger, H., Stewart, G. R., Hennig, R. G., Hirschfeld, P. J., and Hamlin, J. J. Pressure-induced superconductivity in the giant Rashba system BiTeI. United States: N. p., 2017. Web. doi:10.1088/1361-648X/aa5567.
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VanGennep, D., Linscheid, A., Jackson, D. E., Weir, S. T., Vohra, Y. K., Berger, H., Stewart, G. R., Hennig, R. G., Hirschfeld, P. J., & Hamlin, J. J. Pressure-induced superconductivity in the giant Rashba system BiTeI. United States. https://doi.org/10.1088/1361-648X/aa5567
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VanGennep, D., Linscheid, A., Jackson, D. E., Weir, S. T., Vohra, Y. K., Berger, H., Stewart, G. R., Hennig, R. G., Hirschfeld, P. J., and Hamlin, J. J. Fri . "Pressure-induced superconductivity in the giant Rashba system BiTeI". United States. https://doi.org/10.1088/1361-648X/aa5567. https://www.osti.gov/servlets/purl/1393356.
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@article{osti_1393356,
title = {Pressure-induced superconductivity in the giant Rashba system BiTeI},
author = {VanGennep, D. and Linscheid, A. and Jackson, D. E. and Weir, S. T. and Vohra, Y. K. and Berger, H. and Stewart, G. R. and Hennig, R. G. and Hirschfeld, P. J. and Hamlin, J. J.},
abstractNote = {We present that at ambient pressure, BiTeI exhibits a giant Rashba splitting of the bulk electronic bands. At low pressures, BiTeI undergoes a transition from trivial insulator to topological insulator. At still higher pressures, two structural transitions are known to occur. We have carried out a series of electrical resistivity and AC magnetic susceptibility measurements on BiTeI at pressure up to ~40 GPa in an effort to characterize the properties of the high-pressure phases. A previous calculation found that the high-pressure orthorhombic P4/nmm structure BiTeI is a metal. We find that this structure is superconducting with T c values as high as 6 K. AC magnetic susceptibility measurements support the bulk nature of the superconductivity. Using electronic structure and phonon calculations, we compute T c and find that our data is consistent with phonon-mediated superconductivity.},
doi = {10.1088/1361-648X/aa5567},
journal = {Journal of Physics. Condensed Matter},
number = 9,
volume = 29,
place = {United States},
year = {Fri Jan 27 00:00:00 EST 2017},
month = {Fri Jan 27 00:00:00 EST 2017}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1088/1361-648X/aa5567
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    Interlayer RKKY coupling in bulk Rashba semiconductors under topological phase transition
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