Observation of a collective mode in superconducting UBe13

Sound propagation in the heavy-fermion superconductor UBe13 is studied at frequencies from 0.9 to 2.4 GHz and temperatures from 0.01 to 100 K. A peak in the acoustic attenuation is observed below the superconducting transition of 0.9 K, instead of the rapid drop expected for a BCS superconductor. Ab...

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Bibliographic Details
Published in:Physical review letters 1985-11, Vol.55 (22), p.2479-2482
Main Authors: GOLDING, B, BISHOP, D. J, BATLOGG, B, HAEMMERLE, W. H, FISK, Z, SMITH, J. L, OTT, H. R
Format: Article
Language:English
Subjects:
Analysing. Testing. Standards
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Metals. Metallurgy
Physics
Properties of type I and type II superconductors
Specific materials
Superconductivity
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Summary:Sound propagation in the heavy-fermion superconductor UBe13 is studied at frequencies from 0.9 to 2.4 GHz and temperatures from 0.01 to 100 K. A peak in the acoustic attenuation is observed below the superconducting transition of 0.9 K, instead of the rapid drop expected for a BCS superconductor. Absorption into a collective mode of a nonsinglet, anisotropic superconductor is proposed. (Author)
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.55.2479