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Pseudo-negative photocurrent spectroscopy in GaAs-AlAs superlattices (1996)

Schrottke, L. ; Grahn, H. T. ; Fujiwara, K.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 79 (1996), S. 4197-4202

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Pseudo-negative photocurrent spectra, i.e., the appearance of a minimum in photocurrent at an absorption maximum, are experimentally studied at different temperatures and excitation intensities in GaAs-AlAs superlattices on GaAs substrates. Superlattice and substrate are isolated by a thick Al0.3Ga0.7As barrier, but electrically connected through penetrating contacts. A simple model is proposed for the analysis of the conditions which can lead to pseudo-negative photocurrent in this sample configuration. The radiative recombination of the carriers in the superlattice was found to be the main process determining the sign of the photocurrent at an absorption maximum. © 1996 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.361877

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