Article ID Journal Published Year Pages File Type
10643608 Superlattices and Microstructures 2005 11 Pages PDF
Abstract
The dc acoustoelectric current jac induced by the interaction of acoustic phonons with the conducting electrons is calculated. The calculation is done in the hypersound regime where qℓ≫1 (here q is the acoustic phonon number and ℓ is the electron mean free path). The electric field consists of dc field E0 and a low frequency alternating field E1. A nonlinear dependence of jac on E0 and E1 is observed. Depending on the direction of the dc field E0 the acoustoelectric current can either be positive or negative. At ωq=1011s−1 and in the absence of E0, Jac is very small and tends to zero at E1=1.3×105Vm−1. Further increase of ωq from 1011 s−1 sees a dramatic shoot “up” of Jac. Lastly the acoustoelectric currrent in the presence of E0 is modulated by E1.
Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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