Ultrasonic attenuation of a superconductor with a spiral spin-density wave

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.12959· OSTI ID:7105328

Simon, M E ^[1]; Aligia, A A ^[2]

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1. Instituto Balseiro, 8400 S.C. de Bariloche (Argentina)
2. Instituto Balseiro, 8400 S.C. de Bariloche (Argentina) Centro Atomico Bariloche, 8400 S.C. de Bariloche (Argentina)

We have calculated the longitudinal ultrasonic attenuation of a simple clean superconducting metal with a spiral spin-density wave (SSDW). The superconducting gap {Delta}({bold k}) vanishes along a circle on the Fermi surface. The ultrasonic attenuation coefficient {alpha}{sub {bold q}} for wave vector {bold q} parallel to the SSDW axis is not directly related to the superconducting density of states, its temperature dependence cannot be fitted by a power law and depends on the ratio between Fermi and sound velocities. For {bold q} perpendicular to the SSDW axis, {alpha}{sub {bold q}}({ital T}) is linear in {ital T} for low enough temperature {ital T}, as for the polar phase of {ital p}-wave superconductors.

• OSTI ID: 7105328
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:22; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATTENUATION
BCS THEORY
EIGENSTATES
ENERGY GAP
SOUND WAVES
SUPERCONDUCTORS
TEMPERATURE EFFECTS
ULTRASONIC WAVES