Nonlinear acoustoelectric effect in a semiconductor superlattice
- 31 May 2000
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 12 (24), 5225-5232
- https://doi.org/10.1088/0953-8984/12/24/313
Abstract
The acoustoelectric effect in a semiconductor superlattice (SL) has been studied for a hypersound in the region ql>>1 (where q is the acoustic wave number and l is the electron mean free path). A nonlinear dependence of the acoustoelectric current jac on the constant electric field E is observed. It is noted that when the electric field is negative the current jac rises, reaches a peak and falls off. On the other hand, when the electric field is positive the current decreases, reaches a minimum and then rises. A similar observation has been noted for an acoustoelectric interaction in a multilayered structure resulting from the analysis of Si/SiO2 structure. The dominant mechanism for such a behaviour is attributed to the periodicity of the energy spectrum along the SL axis.Keywords
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