Observation of Tamm states in superlattices

Tamm states are intentionally introduced in AlGaAs/GaAs superlattices by a terminating layer of AlAs. Formation of these states is manifested by excitonic interband transitions in photoluminescence excitation spectra. Photocurrent experiments under an electric field show additional transitions as we...

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Veröffentlicht in:	Physical review letters 1990-05, Vol.64 (21), p.2555-2558
Hauptverfasser:	OHNO, H, MENDEZ, E. E, BRUM, J. A, HONG, J. M, AGULLO-RUEDA, F, CHANG, L. L, ESAKI, L
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Physics Surface and interface electron states
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Tamm states are intentionally introduced in AlGaAs/GaAs superlattices by a terminating layer of AlAs. Formation of these states is manifested by excitonic interband transitions in photoluminescence excitation spectra. Photocurrent experiments under an electric field show additional transitions as well as anticrossing interactions between Tamm states and Stark-ladder states associated with the superlattice.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.64.2555