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Title: Effect of atomic disorder and Ce doping on superconductivity of Ca3Rh4Sn13: Electric transport properties under high pressure

Here, we report the observation of a superconducting state below ~8 K coexistent with a spin-glass state caused by atomic disorder in Ce substituted Ca3Rh4Sn13. Measurements of specific heat, resistivity, and magnetism reveal the existence of inhomogeneous superconductivity in samples doped with Ce with superconducting critical temperatures Tc higher than those observed in the parent compound. For Ca3Rh4Sn13, the negative value of the change in resistivity ρ with pressure P, dρ/dP correlates well with the calculated decrease in the density of states (DOS) at the Fermi energy with P. In conclusion, based on band-structure calculations performed under pressure, we demonstrate how the change in DOS would affect Tc of Ca3Rh4Sn13 under negative lattice pressure in samples that are strongly defected by quenching.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [4] ;  [3]
  1. Univ. of Silesia, Katowice (Poland). Inst. of Physics; Polish Academy of Sciences, Wroclaw (Poland). Centre for Advanced Materials and Smart Structures
  2. Univ. of Silesia, Katowice (Poland). Inst. of Physics
  3. Univ. of California, San Diego, CA (United States). Dept. of Physics
  4. Univ. of California, San Diego, CA (United States). Dept. of Physics and Materials Science and Engineering Program
Publication Date:
OSTI Identifier:
1336813
Grant/Contract Number:
NA0002909; NA0001841
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Univ. of California, San Diego, 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