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Titolo:
Atomic structure and optical anisotropy of III-V(001) surfaces
Autore:
Esser, N; Schmidt, WG; Cobet, C; Fleischer, K; Shkrebtii, AI; Fimland, BO; Richter, W;
Indirizzi:
Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany Tech Univ Berlin Berlin Germany D-10623 perphys, D-10623 Berlin, Germany Univ Jena, IFTO, D-07743 Jena, Germany Univ Jena Jena Germany D-07743Univ Jena, IFTO, D-07743 Jena, Germany Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada Univ Toronto TorontoON Canada M5S 1A7 Phys, Toronto, ON M5S 1A7, Canada Norwegian Univ Sci & Technol, Dept Phys Elect, NTNU, N-7034 Trondheim, Norway Norwegian Univ Sci & Technol Trondheim Norway N-7034 4 Trondheim, Norway
Titolo Testata:
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
fascicolo: 5, volume: 19, anno: 2001,
pagine: 1756 - 1761
SICI:
1071-1023(200109/10)19:5<1756:ASAOAO>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING-TUNNELING-MICROSCOPY; REFLECTANCE-DIFFERENCE SPECTROSCOPY; TEMPERATURE-DEPENDENCE; INP(001) SURFACES; ELECTRONIC-STRUCTURE; RECONSTRUCTIONS; SEMICONDUCTORS; GAAS(100); GAAS(001); GROWTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Esser, N Tech Univ Berlin, Inst Festkorperphys, Hardenbergstr 36, D-10623 Berlin, Germany Tech Univ Berlin Hardenbergstr 36 Berlin Germany D-10623 Germany
Citazione:
N. Esser et al., "Atomic structure and optical anisotropy of III-V(001) surfaces", J VAC SCI B, 19(5), 2001, pp. 1756-1761

Abstract

The optical anisotropy of materials with isotropic bulk crystal structure depends to a large extent on the surface atomic structure. For instance, data obtained by reflectance anisotropy spectroscopy (RAS) on (001) surfaces of zinc blende semiconductors such as InP and GaAs, have a fingerprint character for the various surface reconstructions. Here we present RAS spectra for GaAs(001) and InP(001) recorded at room temperature and at low temperature. We show that by comparison with a theoretical analysis based on ab initio density functional theory in local-density approximation calculations the origin of characteristic spectral features can be identified and thus RAS spectra utilized to discriminate between different competing structural models. We identify contributions related to electronic transitions between surface states as well as features arising from surface perturbed bulk wavefunctions. We explain the high sensitivity of RAS to the surface structure. and chemistry as due to the surface state related features. (C) 2001 American Vacuum Society.

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Documento generato il 21/01/21 alle ore 03:47:13