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Titolo:
Valence-band photoemission from GaAs(100)-c(4x4) - art. no. 085309
Autore:
Strasser, T; Solterbeck, C; Schattke, W; Bartos, I; Cukr, M; Jiricek, P;
Indirizzi:
Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany Univ KielKiel Germany D-24098 t Phys & Astrophys, D-24098 Kiel, Germany Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic Acad Sci Czech Republ Prague Czech Republic hys, Prague, Czech Republic
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 8, volume: 6308, anno: 2001,
pagine: 5309 -
SICI:
0163-1829(20010215)6308:8<5309:VPFG-A>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING-TUNNELING-MICROSCOPY; ANGLE-RESOLVED PHOTOEMISSION; 001 SURFACES; RECONSTRUCTIONS; GAAS(001); GAAS(110); MBE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Strasser, T Univ Kiel, Inst Theoret Phys & Astrophys, Leibnizstr 15, D-24098 Kiel, Germany Univ Kiel Leibnizstr 15 Kiel Germany D-24098 98 Kiel, Germany
Citazione:
T. Strasser et al., "Valence-band photoemission from GaAs(100)-c(4x4) - art. no. 085309", PHYS REV B, 6308(8), 2001, pp. 5309

Abstract

The energy distributions of photoelectrons emitted from the c(4 x 4) reconstructed GaAs(100) surface are carefully analyzed within the one-step modelof photoemission, thus demonstrating that such calculations work for largeunit cells. It is used for detailed interpretation of published and new angular resolved He I experimental data. Surface-related features are found and their localization and symmetry are determined. Backfolding of the electron energy bands and its splitting at the reduced Brillouin zone's boundaries lead to smaller energy dispersion of electron surface states and resonances. The experimentally observed longer period of a surface resonance than that corresponding to the translation symmetry of the reconstructed surfaceis confirmed and explained. The existence of two surface states near the upper valence-band edge is verified. One major difference between the theoryand the experiment is found that cannot be explained by means of the one-step model for a perfectly reconstructed surface.

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Documento generato il 29/03/20 alle ore 17:17:52