IMPURITY EFFECT ON THE CHEMICAL-POTENTIAL SHIFTS IN THE 2-DIMENSIONALHUBBARD-MODEL

Authors
KIM HD
Citation
Hd. Kim, IMPURITY EFFECT ON THE CHEMICAL-POTENTIAL SHIFTS IN THE 2-DIMENSIONALHUBBARD-MODEL, Journal of the Korean Physical Society, 32(5), 1998, pp. 707-712
Citations number
20
Categorie Soggetti
Physics
Journal title
Journal of the Korean Physical Society → ACNP
ISSN journal
03744884
Volume
32
Issue
5
Year of publication
1998
Pages
707 - 712
Database
ISI
SICI code
0374-4884(1998)32:5<707:IEOTCS>2.0.ZU;2-1
Abstract
The impurity effect on the position of the chemical potential in the t wo-dimensional Hubbard model was investigated using the exact diagonal ization method and the coherent potential approximation. Within these methods the chemical potential is pinned in the middle of the gap when the strength of the impurity potential is about 1 eV, which may expla in the photoemission spectroscopic results for Nd2-xCexCuO4.