Phonon self-energy effects due to superconductivity: A real-axis formulation

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

DOI:https://doi.org/10.1103/PhysRevB.45.9865· OSTI ID:7113372

Marsiglio, F ^[1]; Akis, R; Carbotte, J P ^[2]

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1. Theoretical Physics Branch, AECL Research, Chalk River Laboratories, Chalk River, Ontario, K0J1J0 (Canada)
2. Department of Physics, McMaster University, Hamilton, Ontario, L8S4M1 (Canada)

The self-energy of {bold q}={bold 0} phonons is calculated in both the superconducting and normal states, with use of a real-axis formulation, valid for arbitrary temperature, impurity scattering rate, and electron-phonon coupling strength. The calculations are performed within the Eliashberg framework. We qualitatively confirm much of the previous work done using Pade approximants. Besides providing quantitative corrections, we also predict an observable effect with low-frequency phonons.

• OSTI ID: 7113372
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:17; 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
BCS THEORY
COUPLING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ENERGY
IMPURITIES
PADE APPROXIMATION
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
SELF-ENERGY
SUPERCONDUCTIVITY
TEMPERATURE EFFECTS