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Title: Effect of atomic disorder and Ce doping on superconductivity of Ca 3 Rh 4 Sn 13 : 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 Ca 3Rh 4Sn 13. Measurements of specific heat, resistivity, and magnetism reveal the existence of inhomogeneous superconductivity in samples doped with Ce with superconducting critical temperatures T c higher than those observed in the parent compound. For Ca 3Rh 4Sn 13, 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 T c of Ca 3Rh 4Sn 13 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:
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
OSTI Identifier:
1336813
Alternate Identifier(s):
OSTI ID: 1256993; OSTI ID: 1361229

Ślebarski, Andrzej, Goraus, Jerzy, Maśka, Maciej M., Witas, P., Fijałkowski, M., Wolowiec, Christian T., Fang, Yuankan, and Maple, Merrill B.. Effect of atomic disorder and Ce doping on superconductivity of Ca3Rh4Sn13 : Electric transport properties under high pressure. United States: N. p., Web. doi:10.1103/PhysRevB.93.245126.
Ślebarski, Andrzej, Goraus, Jerzy, Maśka, Maciej M., Witas, P., Fijałkowski, M., Wolowiec, Christian T., Fang, Yuankan, & Maple, Merrill B.. Effect of atomic disorder and Ce doping on superconductivity of Ca3Rh4Sn13 : Electric transport properties under high pressure. United States. doi:10.1103/PhysRevB.93.245126.
Ślebarski, Andrzej, Goraus, Jerzy, Maśka, Maciej M., Witas, P., Fijałkowski, M., Wolowiec, Christian T., Fang, Yuankan, and Maple, Merrill B.. 2016. "Effect of atomic disorder and Ce doping on superconductivity of Ca3Rh4Sn13 : Electric transport properties under high pressure". United States. doi:10.1103/PhysRevB.93.245126. https://www.osti.gov/servlets/purl/1336813.
@article{osti_1336813,
title = {Effect of atomic disorder and Ce doping on superconductivity of Ca3Rh4Sn13 : Electric transport properties under high pressure},
author = {Ślebarski, Andrzej and Goraus, Jerzy and Maśka, Maciej M. and Witas, P. and Fijałkowski, M. and Wolowiec, Christian T. and Fang, Yuankan and Maple, Merrill B.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.93.245126},
journal = {Physical Review B},
number = 24,
volume = 93,
place = {United States},
year = {2016},
month = {6}
}