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ACOUSTOMAGNETOELECTRIC EFFECT IN A QUANTUM WELL
Corresponding Author(s) : Nguyen Van Hieu
UED Journal of Social Sciences, Humanities and Education,
Vol. 2 No. 1 (2012): UED JOURNAL OF SOCIAL SCIENCES, HUMANITIES AND EDUCATION
Abstract
The acoustomagnetoelectric effect in a quantum well is investigated for an acoustic wave whose wavelength l=2π/q is smaller than the mean free path ℓ of the electrons and hypersound in the region qℓ>>1(where q is the acoustic wave number). The analytical expression for the acoustomagnetoelectric current jAME is calculated by using the Boltzmann kinetic equation for the interaction between electrons and acoustic wave in the case of relaxation time of momentum t is constant approximation and the non degenerate electron gas. The dependence of the nonlinear jAME on the temperature T of the system, the acoustic wave number q and the width L of a quantum well are obtained. The result indicates that the existence of jAME in a quantum well due to the transition between minibands n®n’ in a quantum well. Numerical calculation has been done and the results are analysed for the AlAs/GaAs/AlAs quantum well. All the results are compared with the bulk semiconductors and the superlattice to show the difference.
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