ENHANCEMENT OF MASS ANISOTROPY IN AN ELECTRON-PHONON COUPLED MODEL CLOSE TO A VAN-HOVE SINGULARITY

Authors
CAPRARA S DELPRETE V
Citation
S. Caprara et V. Delprete, ENHANCEMENT OF MASS ANISOTROPY IN AN ELECTRON-PHONON COUPLED MODEL CLOSE TO A VAN-HOVE SINGULARITY, Journal of physics. Condensed matter, 9(46), 1997, pp. 10195-10202
Citations number
15
Categorie Soggetti
Physics, Condensed Matter
Journal title
Journal of physics. Condensed matter → ACNP
ISSN journal
09538984
Volume
9
Issue
46
Year of publication
1997
Pages
10195 - 10202
Database
ISI
SICI code
0953-8984(1997)9:46<10195:EOMAIA>2.0.ZU;2-8
Abstract
We investigate the effect of electronic mass renormalization due to th e coupling of electrons to an Einstein phonon in the presence of a Van Hove singularity in the density of states, resulting from a saddle po int in the bare electronic spectrum. We Show that an enhancement of ma ss anisotropy is produced in a wide region of parameters of our model.