Boson structure in the quasiparticle density of states of superconductors with nodes in the gap

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.5325· OSTI ID:6652850

Jiang, C; Carbotte, J P ^[1]; Dynes, R C ^[2]

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1. Physics Department, McMaster University, Hamilton, Ontario, L8S 4M1 (Canada)
2. Physics Department 0319, University of California at San Diego, La Jolla, California 92093 (United States)

Within a generalized Eliashberg formalism, valid for exotic pairing states of a [ital D]-wave superconductor, we have studied how details of the electron-boson spectral density responsible for superconductivity manifest themselves as structure in the quasiparticle density of states. We find that the boson structure, which is to be measured relative to the energy defined by the peak in this function, shifts very little when resonant impurity scattering is introduced. Impurity scattering, however, can fill in the density of states at zero frequency and in the region below the peak which defines a gap value. Finite-temperature effects further smear this low-frequency region, as is expected from the well-studied isotropic case. Some comments on comparison with experiments are also given.

• OSTI ID: 6652850
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:9; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSONS
D WAVES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
ENERGY-LEVEL DENSITY
GORKOV-ELIASHBERG THEORY
PARTIAL WAVES
PHYSICAL PROPERTIES
QUASI PARTICLES
SUPERCONDUCTIVITY
TEMPERATURE EFFECTS