Phonon-Induced Renormalization and Interaction: An Improvement on Frohlich Transformation
| dc.creator | Zheng, H. | |
| dc.date | 2000-04-24 | |
| dc.date.accessioned | 2026-07-07T02:37:27Z | |
| dc.date.available | 2026-07-07T02:37:27Z | |
| dc.description | Starting from the Flohlich electron-phonon model, which has a history of 50 years, a new unitary transformation is proposed to implement the perturbation treatment. Our main results are: (1)The phonon-induced interaction shows a crossover from the BCS-like potential when the phonon frequency $ω_p$ is much smaller than the Fermi energy $E_F$ to that of the small polarons when $ω_p/E_F\ge 1$. (2)The jump of momentum distribution of electron number $n_{\bf k}$ at the Fermi surface goes to zero when the dimensionless coupling constant $λ$ increases to the critical value $λ_c\ge 1$, which means a possible broken down of the Fermi-liquid description. | |
| dc.description | 2 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0004388 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0004388 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/16294 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Superconductivity | |
| dc.title | Phonon-Induced Renormalization and Interaction: An Improvement on Frohlich Transformation | |
| dc.type | text |