Surface metal-insulator transition in the Hubbard model

Authors
Potthoff, M Nolting, W
Citation
M. Potthoff et W. Nolting, Surface metal-insulator transition in the Hubbard model, PHYS REV B, 59(4), 1999, pp. 2549-2555
Citations number
30
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
4
Year of publication
1999
Pages
2549 - 2555
Database
ISI
SICI code
0163-1829(19990115)59:4<2549:SMTITH>2.0.ZU;2-4
Abstract
The correlation-driven metal-insulator (Mott) transition at a solid surface is studied within the Hubbard model for a semi-infinite lattice by means o f the dynamical mean-field theory. The transition takes place at a unique c ritical strength of the interaction. Depending on the surface geo-metry, th e interaction strength, and the wave vector, we find one-electron excitatio ns in the coherent part of the surface-projected metallic spectrum, which a re confined to two dimensions. [S0163-1829(99)04904-8].