ELECTRON LOCALIZATION AND THE NONMETAL-TO-METAL TRANSITION AT ULTRATHIN ALKALI-METAL SI(111) INTERFACES/

Authors
WEITERING HH CHEN J PEREZSANDOZ R DINARDO NJ
Citation
Hh. Weitering et al., ELECTRON LOCALIZATION AND THE NONMETAL-TO-METAL TRANSITION AT ULTRATHIN ALKALI-METAL SI(111) INTERFACES/, Surface science, 309, 1994, pp. 978-983
Citations number
21
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
309
Year of publication
1994
Part
B
Pages
978 - 983
Database
ISI
SICI code
0039-6028(1994)309:<978:ELATNT>2.0.ZU;2-1
Abstract
The K/Si(111)7 X 7 and K/Si(111)(square-root 3 x square-root 3)R30-deg rees-B interfaces are nonmetallic at room temperature saturation cover age. In contrast, the Cs/Si(111)7 X 7 interface metallizes below satur ation coverage. Possible mechanisms of electron localization in pre-me tallized films will be discussed. We conclude that electron correlatio n effects are important in determining the electronic properties of th ese interfaces.