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This content will become publicly available on November 15, 2018

Title: Superconductivity of barium-VI synthesized via compression at low temperatures

For this research using a membrane-driven diamond anvil cell and both ac magnetic susceptibility and electrical resistivity measurements, we have characterized the superconducting phase diagram of elemental barium to pressures as high as 65 GPa. We have determined the superconducting properties of the recently discovered Ba-VI crystal structure, which can only be accessed via the application of pressure at low temperature. We find that Ba-VI exhibits a maximum T c near 8 K, which is substantially higher than the maximum T c found when pressure is applied at room temperature. We discuss our results in terms of the implications for pressure-induced superconductivity in other elements exhibiting complex/modulated structures at high pressure. Lastly, we highlight the potential of cryogenic compression to reveal additional richness in previously explored high-pressure phase diagrams.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1]
  1. Univ. of Florida, Gainesville, FL (United States). Department of Physics
  2. Univ. of Birmingham (United Kingdom). Department of Physics
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physics Division
Publication Date:
Report Number(s):
LLNL-JRNL-736279
Journal ID: ISSN 2469-9950; PRBMDO; 887436
Grant/Contract Number:
AC52-07NA27344; NA0002928
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 18; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1458667
Alternate Identifier(s):
OSTI ID: 1408929