Evidence for Anderson-Brinkman-Morel--type state in a heavy-fermion superconductor from ultrasonic attenuation

Journal Article · Mon Jul 08 04:00:00 EDT 1985 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.55.250· OSTI ID:5511318

Rodriguez, J P

The ultrasonic attenuation for a superconductor with generalized pairing is calculated via a scalar quasiparticle Boltzmann equation in the relaxation-time approximation, in the hydrodynamic limit. The attenuation follows a power law as a function of temperature T if the gap vanishes at points or lines on the Fermi surface. With an Anderson-Brinkman-Morel--type excitation spectrum, a T/sup 2/ behavior is obtained for the sound attenuation, which is consistent with the recently measured attenuation for the heavy-fermion system UPt/sub 3/.

• Research Organization: Loomis Laboratory of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
• OSTI ID: 5511318
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 55:2; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACOUSTICS
ACTINIDE ALLOYS
ALLOYS
ATTENUATION
BOLTZMANN EQUATION
COOPER PAIRS
CORRELATIONS
DIFFERENTIAL EQUATIONS
ENERGY GAP
EQUATIONS
FLUID MECHANICS
HYDRODYNAMICS
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
QUASI PARTICLES
RELAXATION
SCALARS
SOUND WAVES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
ULTRASONIC WAVES
URANIUM ALLOYS