Absence of metallicity in Cs-GaAs(110): A Hubbard-model study
Date
1993Source Title
Physical Review B
Print ISSN
0163-1829
Publisher
American Physical Society
Volume
47
Issue
24
Pages
16391 - 16394
Language
English
Type
ArticleItem Usage Stats
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Abstract
Using an approximate solution of the Hubbard-model Hamiltonian, we are able to establish that the Cs-GaAs(110) system becomes a Mott insulator at submonolayer Cs coverages. We also provide a consistent interpretation of electron-energy-loss and scanning-tunneling-spectroscopies data. The correlation effects are important for this system with an estimated correlation energy of 0.4 eV. © 1993 The American Physical Society.