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Quenching of Miniband Transport in Biased Undoped Superlattices
Author(s) -
Rauch C.,
Strasser G.,
Unterrainer K.,
Boxleitner W.,
Gornik E.
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199711)204:1<393::aid-pssb393>3.0.co;2-j
Subject(s) - superlattice , electric field , condensed matter physics , electron , materials science , quenching (fluorescence) , transfer matrix method (optics) , atomic physics , physics , optoelectronics , optics , quantum mechanics , fluorescence
The application of an electric field on a superlattice leads to a localization of the electron wave functions. We present a study on electric field dependent transport in superlattice minibands using the technique of hot electron spectroscopy. A three‐terminal device is used to inject an energy tunable electron beam into a biased superlattice. The transfer ratio is measured at 4.2 K as a function of injection energy at different superlattice bias conditions. A significant decrease of the miniband transmission with increasing electric field is observed and compared to the results of a calculation based on a transfer matrix method. At about 4 kV/cm (Δ = eFNd = 0.6) the miniband current disappears. The transfer characteristics and the shift of the superlattice states show good agreement to the theoretical results.