ABSENCE OF METALLICITY IN CS-GAAS(110) - A HUBBARD-MODEL STUDY

Authors
GEDIK Z CIRACI S BATRA IP
Citation
Z. Gedik et al., ABSENCE OF METALLICITY IN CS-GAAS(110) - A HUBBARD-MODEL STUDY, Physical review. B, Condensed matter, 47(24), 1993, pp. 16391-16394
Citations number
28
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
47
Issue
24
Year of publication
1993
Pages
16391 - 16394
Database
ISI
SICI code
0163-1829(1993)47:24<16391:AOMIC->2.0.ZU;2-S
Abstract
Using an approximate solution of the Hubbard-model Hamiltonian, we are able to establish that the Cs-GaAs(110) system becomes a Mott insulat or at submonolayer Cs coverages. We also provide a consistent interpre tation of electron-energy-loss and scanning-tunneling-spectroscopies d ata. The correlation effects are important for this system with an est imated correlation energy of 0.4 eV.