EXACT AND ADIABATIC SOLUTIONS FOR A SPINLESS PEIERLS-HUBBARD MODEL INA FINITE CLUSTER

Authors
CARDENAS M GOTTLIEB D ROSSLER J
Citation
M. Cardenas et al., EXACT AND ADIABATIC SOLUTIONS FOR A SPINLESS PEIERLS-HUBBARD MODEL INA FINITE CLUSTER, Physical review. B, Condensed matter, 48(15), 1993, pp. 10719-10727
Citations number
28
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
48
Issue
15
Year of publication
1993
Pages
10719 - 10727
Database
ISI
SICI code
0163-1829(1993)48:15<10719:EAASFA>2.0.ZU;2-4
Abstract
The exact solution of the Hubbard-Peierls model is given in a cluster of six atoms and three spinless electrons. Phonons with wave vector k = pi are retained and quantum mechanically analyzed. Energy level and several averages are evaluated, thus determining the physical properti es of the model in terms of the parameters of the system. The regime o f the distorted lattice is obtained. The exact and Born-Oppenheimer (B O) results are compared, concluding that the BO enhances quantum fluct uations; this peculiar behavior is explained.