Umklapp scattering and electron pairing cutoff in BCS superconductors
| dc.creator | Zheng, X. H. | |
| dc.creator | Walmsley, D. G. | |
| dc.date | 2003-08-18 | |
| dc.date.accessioned | 2026-07-07T02:52:58Z | |
| dc.date.available | 2026-07-07T02:52:58Z | |
| dc.description | In a superconductor electrons form pairs for which the end states of normal and umklapp scattering may overlap. This cuts electron pairing off at a phonon frequency, $ω_c$, low compared with the Debye frequency, $ω_D$. Using this insight, correct values of $2Δ/k_BT_c$ (average error 8.9%) for 12 superconductive metals, including Hg and Pb, are achieved from simple BCS formalism with an average $ω_c/ω_D$ of 0.148: Landau's idea of a Fermi liquid may cover strong-coupling superconductors. The cancellation between normal and umklapp scattering may be more important than a strong electron-phonon interaction in reaching a high critical temperature $T_c$. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0308350 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0308350 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/22036 | |
| dc.subject | Superconductivity | |
| dc.title | Umklapp scattering and electron pairing cutoff in BCS superconductors | |
| dc.type | text |