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Title: Multiple superconducting states induced by pressure in Mo 3 Sb 7

Tuning competing ordering mechanisms with hydrostatic pressure in the 4 d intermetallic compound Mo 3Sb 7 reveals an intricate interplay of structure, magnetism, and superconductivity. Synchrotron x-ray diffraction and magnetic susceptibility measurements, both employing diamond anvil cell technologies, link a first-order structural phase transition to a doubling of the superconducting transition temperature. In contrast to the spin-dimer picture for Mo 3Sb 7, we deduce from x-ray absorption near-edge structure and dc magnetization measurements at ambient pressure that Mo 3Sb 7 should possess only very small, itinerant magnetic moments. As a result, the pressure evolution of the superconducting transition temperature strongly suggests its enhancement is due to a difference in the phonon density-of-states with changed crystal symmetry.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ; ORCiD logo [5] ;  [2]
  1. Okinawa Institute of Science and Technology Graduate University, Okinawa (Japan); California Inst. of Technology (CalTech), Pasadena, CA (United States)
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  3. The Univ. of Chicago, Chicago, IL (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725; SC0014866; AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 12; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
OSTI Identifier:
1485319
Alternate Identifier(s):
OSTI ID: 1345438

Feng, Yejun, Wang, Yishu, Palmer, A., Li, Ling, Silevitch, D. M., Calder, Stuart A., and Rosenbaum, T. F.. Multiple superconducting states induced by pressure in Mo3Sb7. United States: N. p., Web. doi:10.1103/PhysRevB.95.125102.
Feng, Yejun, Wang, Yishu, Palmer, A., Li, Ling, Silevitch, D. M., Calder, Stuart A., & Rosenbaum, T. F.. Multiple superconducting states induced by pressure in Mo3Sb7. United States. doi:10.1103/PhysRevB.95.125102.
Feng, Yejun, Wang, Yishu, Palmer, A., Li, Ling, Silevitch, D. M., Calder, Stuart A., and Rosenbaum, T. F.. 2017. "Multiple superconducting states induced by pressure in Mo3Sb7". United States. doi:10.1103/PhysRevB.95.125102. https://www.osti.gov/servlets/purl/1485319.
@article{osti_1485319,
title = {Multiple superconducting states induced by pressure in Mo3Sb7},
author = {Feng, Yejun and Wang, Yishu and Palmer, A. and Li, Ling and Silevitch, D. M. and Calder, Stuart A. and Rosenbaum, T. F.},
abstractNote = {Tuning competing ordering mechanisms with hydrostatic pressure in the 4d intermetallic compound Mo3Sb7 reveals an intricate interplay of structure, magnetism, and superconductivity. Synchrotron x-ray diffraction and magnetic susceptibility measurements, both employing diamond anvil cell technologies, link a first-order structural phase transition to a doubling of the superconducting transition temperature. In contrast to the spin-dimer picture for Mo3Sb7, we deduce from x-ray absorption near-edge structure and dc magnetization measurements at ambient pressure that Mo3Sb7 should possess only very small, itinerant magnetic moments. As a result, the pressure evolution of the superconducting transition temperature strongly suggests its enhancement is due to a difference in the phonon density-of-states with changed crystal symmetry.},
doi = {10.1103/PhysRevB.95.125102},
journal = {Physical Review B},
number = 12,
volume = 95,
place = {United States},
year = {2017},
month = {3}
}

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