Superconductivity and Charge-Density Wave Phase in the Holstein Model: a Weak Coupling Limit

• Authors: P. Grzybowski , R. Micnas
• Languages of publication: EN

Abstracts

EN

The variational canonical transformation method has been applied to the Holstein model to obtain an effective polaronic Hamiltonian, which is subsequently analyzed in the limit of a weak effective electron-electron interaction. A competition between the superconducting and charge-density wave phases has been studied in the light of strong polaronic effects. The phase diagrams illustrating the system evolution from adiabatic to anti-adiabatic limit are presented.

Keywords

EN

71.38.-k; 71.45.Lr; 74.20.Mn

Discipline

• 74.20.Mn: Nonconventional mechanisms
• 71.45.Lr: Charge-density-wave systems(see also 75.30.Fv Spin-density waves)
• 71.38.-k: Polarons and electron-phonon interactions(see also 63.20.K- Phonon interactions in lattice dynamics)

• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 111
• Issue: 4
• Pages: 453-463

Dates

published

2007-04

received

2006-09-14

Contributors

author

P. Grzybowski

• Solid State Theory Division, Institute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

R. Micnas

• Solid State Theory Division, Institute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.111.453