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Signature of superconductivity in UBe13 as seen by neutron scattering: Superconducting and magnetic energy scales

Hiess, Arno LU ; Schneidewind, A.; Stockert, O. and Fisk, Z. (2014) In Physical Review B (Condensed Matter and Materials Physics) 89(23).
Abstract
We here present inelastic neutron scattering results on the strongly correlated cubic superconductor UBe13 (T-c = 0.85 K) obtained on a large single crystal by high-resolution cold neutron three-axis spectroscopy. We observed spin dynamics at a unique momentum space position building up below T similar to 50 K and changing significantly on entering the superconducting state. The observed short-range longitudinal character of the correlations can be understood as a result of competing magnetic interactions. The energy dependence in the normal state reflects the energy scales determined from specific heat, whereas the low-temperature data suggest the opening of a superconducting gap. Our findings are consistent with a superconducting order... (More)
We here present inelastic neutron scattering results on the strongly correlated cubic superconductor UBe13 (T-c = 0.85 K) obtained on a large single crystal by high-resolution cold neutron three-axis spectroscopy. We observed spin dynamics at a unique momentum space position building up below T similar to 50 K and changing significantly on entering the superconducting state. The observed short-range longitudinal character of the correlations can be understood as a result of competing magnetic interactions. The energy dependence in the normal state reflects the energy scales determined from specific heat, whereas the low-temperature data suggest the opening of a superconducting gap. Our findings are consistent with a superconducting order parameter exhibiting s +/- or d-wave symmetry and placing pure UBe13 in the strong coupling regime. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
89
issue
23
publisher
American Physical Society
external identifiers
  • wos:000339049300002
  • scopus:84902578429
ISSN
1098-0121
DOI
10.1103/PhysRevB.89.235118
language
English
LU publication?
yes
id
5d7283c4-e20b-4248-9b25-90e4bb30ad4e (old id 4598764)
date added to LUP
2014-09-05 12:32:34
date last changed
2017-01-01 05:36:53
@article{5d7283c4-e20b-4248-9b25-90e4bb30ad4e,
  abstract     = {We here present inelastic neutron scattering results on the strongly correlated cubic superconductor UBe13 (T-c = 0.85 K) obtained on a large single crystal by high-resolution cold neutron three-axis spectroscopy. We observed spin dynamics at a unique momentum space position building up below T similar to 50 K and changing significantly on entering the superconducting state. The observed short-range longitudinal character of the correlations can be understood as a result of competing magnetic interactions. The energy dependence in the normal state reflects the energy scales determined from specific heat, whereas the low-temperature data suggest the opening of a superconducting gap. Our findings are consistent with a superconducting order parameter exhibiting s +/- or d-wave symmetry and placing pure UBe13 in the strong coupling regime.},
  articleno    = {235118},
  author       = {Hiess, Arno and Schneidewind, A. and Stockert, O. and Fisk, Z.},
  issn         = {1098-0121},
  language     = {eng},
  number       = {23},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Signature of superconductivity in UBe13 as seen by neutron scattering: Superconducting and magnetic energy scales},
  url          = {http://dx.doi.org/10.1103/PhysRevB.89.235118},
  volume       = {89},
  year         = {2014},
}