Effect of finite quasiparticle lifetime on the frequency dependence of phonon lifetimes in d{sub x{sup 2}{minus}y{sup 2}} superconductors

Conference · Fri Dec 30 23:00:00 EST 1994

OSTI ID:68440

Coffey, D ^[1]; Coffey, L ^[2]

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1. State Univ. of New York, Buffalo, NY (United States)
2. Illinois Institute of Technology, Chicago, IL (United States)

The frequency dependence of phonon lifetimes in a superconductor with a d{sub x{sup 2}{minus}y{sup 2}} order parameter is investigated. The authors show that the inclusion of a finite quasiparticle lifetime due to impurity scattering and spontaneous quasiparticle decay smears features, recently proposed as signatures of d-wave superconductivity in cuprate superconductors. They show also that the tight-binding bandstructure leads to features at high frequencies associated with superconductivity. These features may serve as a new probe of the shape of the Fermi surface in cuprate superconductors.

• Research Organization: Los Alamos National Lab., NM (United States)
• OSTI ID: 68440
• Report Number(s): LA-UR--94-1148; CONF-931247--; ON: DE94009293
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COPPER OXIDES
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
LIFETIME
ORDER PARAMETERS
PHONONS
QUASI PARTICLES