Variational ground state of a system with strong electron-phonon interaction
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
A new variational ground state of a system with strong electron-phonon interaction has been proposed in which the electron subsystem is in a superconducting pairing state and the phonon subsystem is in a two-phonon coherent state. We have shown that such a variational state is necessary for obtaining reasonable magnitudes for the energy and for the effective mass of the charge carriers.
- Research Organization:
- Center of Theoretical Physics, Chinese Center of Advanced Science Technology (World Laboratory), Beijing, People's Republic of China 200030, People's Republic of China
- OSTI ID:
- 6857806
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:16; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE CARRIERS
COHERENT SCATTERING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ENERGY GAP
ENERGY LEVELS
GROUND STATES
MATHEMATICAL MODELS
PHYSICAL PROPERTIES
POLARONS
QUASI PARTICLES
SCATTERING
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VARIATIONAL METHODS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE CARRIERS
COHERENT SCATTERING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ENERGY GAP
ENERGY LEVELS
GROUND STATES
MATHEMATICAL MODELS
PHYSICAL PROPERTIES
POLARONS
QUASI PARTICLES
SCATTERING
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VARIATIONAL METHODS