https://doi.org/10.1140/epjb/e2004-00065-5
Enhancements of the superconducting transition temperature within the two-band model
1
Max-Planck-Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
2
Institute of Physics, A. Mickiewicz University, 85 Umultowska St., 61-614 Poznan, Poland
3
Los Alamos National Laboratory, Theoretical Division, Los Alamos, NM87545, USA
Corresponding author: a a.bussmann-holder@fkf.mpg.de
Received:
2
July
2003
Published online:
2
April
2004
The two-band model as introduced by Suhl, Matthias and Walker [Phys. Rev. Lett. 3, 552 (1959)] accounts for multiple energy bands in the vicinity of the Fermi energy which could contribute to electron pairing in superconducting systems. Here, extensions of this model are investigated wherein the effects of coupled superconducting order parameters with different symmetries and the presence of strong electron-lattice coupling on the superconducting transition temperature Tc are studied. Substantial enhancements of Tc are obtained from both effects.
PACS: 74.20.-z – Theories and models of superconducting state
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
