Signature of superconductivity in UBe${_1}$${_3}$ as seen by neutron scattering: Superconducting and magnetic energy scales

Hiess, A.; Schneidewind, A.; Fisk, Z.; Stockert, O.

doi:10.1103/PhysRevB.89.235118

Journal Article

FZJ-2014-03513

Signature of superconductivity in UBe${_1}$${_3}$ as seen by neutron scattering: Superconducting and magnetic energy scales

Hiess, A. (Corresponding Author) ; Schneidewind, A.FZJ* ; Stockert, O. ; Fisk, Z.

2014
APS College Park, Md.

Physical review / B 89(23), 235118 (2014) [10.1103/PhysRevB.89.235118]

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/9124 doi:10.1103/PhysRevB.89.235118

Abstract: We here present inelastic neutron scattering results on the strongly correlated cubic superconductor UBe13(Tc = 0.85 K) obtained on a large single crystal by high-resolution cold neutron three-axis spectroscopy. Weobserved spin dynamics at a unique momentum space position building up below T ∼ 50 K and changingsignificantly on entering the superconducting state. The observed short-range longitudinal character of thecorrelations can be understood as a result of competing magnetic interactions. The energy dependence in thenormal state reflects the energy scales determined from specific heat, whereas the low-temperature data suggestthe opening of a superconducting gap. Our findings are consistent with a superconducting order parameterexhibiting s± or d-wave symmetry and placing pure UBe13 in the strong coupling regime.

Keyword(s): Basic research (1st) ; Key Technologies (1st) ; Others (1st) ; Fundamental Science (1st) ; Magnetism (2nd) ; Condensed Matter Physics (2nd)