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Angle-resolved photoemission spectroscopy of the 1x1 ordered overlayers on iodine-saturated GaAs(001) and InAs(001)
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1996 (English)In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 352, 387-390 p.Article in journal (Refereed) Published
Abstract [en]

Angle-resolved valence band photoelectron spectra are collected from 1 X 1 ordered overlayers on I-2-saturated GaAs(001)-4 x 1, -c(2 X 8), and InAs(001)-c(8 x 2). A high-intensity dispersive surface state, located approximately 4.4 eV below the valence band maximum, is observed in each case. The state passes through an open lens in the projected bulk density of states and disperses symmetrically around the surface Brillouin zone edge. For all surfaces studied, the state is stronger when excited with the electric field polarized in the [110], as compared to the <(1)over bar 10>], azimuth. Since the state is independent of the termination of the initial surface, and since iodine bonds primarily to the outermost element, the state must result from delocalization of the electron states in the overlayer, and is not related to bonding with the substrate.

Place, publisher, year, edition, pages
1996. Vol. 352, 387-390 p.
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Natural Sciences
Identifiers
URN: urn:nbn:se:kth:diva-84724DOI: 10.1016/0039-6028(95)01166-8ISI: A1996UV25400074OAI: oai:DiVA.org:kth-84724DiVA: diva2:499587
Note
NR 20140805Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2017-12-07Bibliographically approved

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