Multiple superconducting states induced by pressure in
- Okinawa Institute of Science and Technology Graduate University, Okinawa (Japan); California Inst. of Technology (CalTech), Pasadena, CA (United States)
- California Inst. of Technology (CalTech), Pasadena, CA (United States)
- The Univ. of Chicago, Chicago, IL (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725; SC0014866; AC02-06CH11357
- OSTI ID:
- 1485319
- Alternate ID(s):
- OSTI ID: 1345438
- Journal Information:
- Physical Review B, Vol. 95, Issue 12; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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