Effect of quasiparticle damping on the ''gap'' of a superconductor at the topological electron transition

Journal Article · Mon Nov 01 04:00:00 EST 1982 · Sov. J. Low Temp. Phys. (Engl. Transl.); (United States)

OSTI ID:5818549

Makarov, V I; Yatsenko, A A

The effect of scattering processes on the singularities of the order parameter ..delta..(p,..omega..) of a superconductor in the case when, under the action of external influences, the Fermi surface epsilon-c(p) = epsilon-c/sub F/ changes its topology at the critical energy epsilon-c/sub cr/ is investigated. It is shown that, for epsilon-c/sub F/: epsilon-c/sub cr/< or approx. =..delta.., the effect of the scattering processes on the root singularities of ..delta..(p,..omega..) is effectively ((epsilon-c/sub F/: epsilon-c/sub cr/)/ms/sup 2/)/sup 1/2/ times weaker (m is the electron mass and s is the velocity of sound). The ..delta..(p,..omega..) singularities that can be observed experimentally manifest themselves in the Fermi-surface-averaged quantity ..delta..(..omega..).

• Research Organization: Physicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Khar'kov
• OSTI ID: 5818549
• Journal Information: Sov. J. Low Temp. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Low Temp. Phys. (Engl. Transl.); (United States) Vol. 8:11; ISSN SJLPD
• Country of Publication: United States
• Language: English

Related Subjects

656102* -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
&amp; Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DAMPING
ENERGY LEVELS
FERMI LEVEL
IMPURITIES
MATHEMATICS
ORDER PARAMETERS
QUASI PARTICLES
SINGULARITY
SUPERCONDUCTORS
TOPOLOGY