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Titolo:
Breakdown of rotational symmetry at semiconductor interfaces: a microscopic description of valence subband mixing
Autore:
Cortez, S; Krebs, O; Voisin, P;
Indirizzi:
Ecole Normale Super, Phys Mat Condensee Lab, F-75231 Paris 05, France Ecole Normale Super Paris France 05 densee Lab, F-75231 Paris 05, France
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL B
fascicolo: 2, volume: 21, anno: 2001,
pagine: 241 - 250
SICI:
1434-6028(200105)21:2<241:BORSAS>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENVELOPE-FUNCTION THEORY; OPTICAL ANISOTROPY; WAVE-FUNCTION; COMMON-ATOM; HETEROSTRUCTURES; SUPERLATTICES; SEGREGATION; ALLOYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Krebs, O Ecole Normale Super, Phys Mat Condensee Lab, 24 Rue Lhomond, F-75231 Paris05, France Ecole Normale Super 24 Rue Lhomond Paris France 05 ris05, France
Citazione:
S. Cortez et al., "Breakdown of rotational symmetry at semiconductor interfaces: a microscopic description of valence subband mixing", EUR PHY J B, 21(2), 2001, pp. 241-250

Abstract

The recently discovered in-plane optical anisotropy of [001]-grown quantumwells offers a new theoretical and experimental insight into the electronic properties of semiconductor interfaces. We first discuss the coupling of X and Y valence bands due to the breakdown of roto-inversion symmetry at a semiconductor hetero-interface, with special attention to its dependence oneffective parameters such as the valence band offset. The intracell localization of Bloch functions is explained from simple theoretical arguments and evaluated numerically from a pseudo-potential microscopic model. The roleof envelope functions is then considered, and we discuss the specific caseof no-common atom interfaces. Experimental results and applications to interface characterization are presented. These calculations give a microscopic justification, and establish the limits of the heuristic "H-BF" model.

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Documento generato il 23/09/20 alle ore 12:42:59