The pressure effects of the tunnelling current in heterostructures: a microscopic calculation
- 20 September 1987
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 20 (26) , 4213-4220
- https://doi.org/10.1088/0022-3719/20/26/021
Abstract
The authors present the results of a pseudopotential calculation of the tunnelling current through a GaAs/AlGaAs/GaAs system as a function of applied pressure. The effects of neglecting the crystal potential in effective-mass theory is examined. Pressure-induced resonant tunnelling associated with the direct-indirect-band-gap transition in the alloy is observed. The total tunnelling current is calculated and its pressure dependence is found to be well described by effective-mass theory. However, it is also found that effective-mass theory greatly underestimates the magnitude of the tunnelling current.Keywords
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