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Digitale Medien

Interband tunneling in polytype GaSb/AlSb/InAs heterostructures (1989)

Luo, L. F. ; Beresford, R. ; Wang, W. I.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 55 (1989), S. 2023-2025

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Details

ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Polytype heterostructures of GaSb/AlSb/InAs show interband tunneling due to the 0.1 eV overlap of the InAs conduction band and the GaSb valence band. This broken-gap configuration results in a novel mechanism for negative differential resistance that has potential applications in high-speed devices. We have demonstrated for the first time interband tunneling in single-barrier and double-barrier polytype heterostructures. Single-barrier structures show negative differential resistance due to the change in interband tunneling with applied bias. A peak-to-valley ratio of 2.7:1 at 77 K was observed in this case. Double-barrier structures using an InAs quantum well exhibit resonant interband tunneling with a peak-to-valley current ratio of more than 60:1 at 77 K. This structure is promising for applications to three-terminal devices because of the very wide quantum well that can be achieved.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.102151

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