SPECTRAL PROPERTIES OF THE 2D HOLSTEIN POLARON

Authors
FEHSKE H LOOS J WELLEIN G
Citation
H. Fehske et al., SPECTRAL PROPERTIES OF THE 2D HOLSTEIN POLARON, Zeitschrift fur Physik. B, Condensed matter, 104(4), 1997, pp. 619-627
Citations number
39
Journal title
Zeitschrift fur Physik. B, Condensed matter → ACNP
ISSN journal
07223277
Volume
104
Issue
4
Year of publication
1997
Pages
619 - 627
Database
ISI
SICI code
0722-3277(1997)104:4<619:SPOT2H>2.0.ZU;2-8
Abstract
The two-dimensional Holstein model is studied by means of direct Lancz os diagonalization preserving the full dynamics and quantum nature of phonons. We present numerical exact results for the single-particle sp ectral function. the polaronic quasiparticle weight, and the optical c onductivity. The polaron band dispersion is derived both from exact di agonalization of small lattices and analytic calculation of the polaro n self-energy.