This title appears in the Scientific Report : 2014 

Signature of superconductivity in UBe${_1}$${_3}$ as seen by neutron scattering: Superconducting and magnetic energy scales
Hiess, A. (Corresponding Author)
Schneidewind, A. / Stockert, O. / Fisk, Z.
Streumethoden; PGI-4
Streumethoden; JCNS-2
Physical review / B, 89 (2014) 23, S. 235118
College Park, Md. APS 2014
Journal Article
In-house Research with PNI
Exploratory materials and phenomena
Spin-based and quantum information
Others > 2
Please use the identifier: in citations.
Please use the identifier: in citations.
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.