Quantum wires and dots driven by intense surface acoustic waves and the quantum attenuation of sound in an electron plasma
نویسندگان
چکیده
We develop a quantum theory of the nonlinear interaction between intense surface acoustic waves and electrons of a quantum well in the regime of moving quantum wires and dots. The quantum nonlinear interaction principally differs from the classical one. In a system of electron wires driven by an acoustic wave the sound attenuation strongly decreases with increasing the sound intensity. However, even in the extreme quantum limit the sound attenuation in the electron system electrons remains nonzero due to residual scattering by impurities in the lowest subband. In the case of electron dots formed by two waves moving in the perpendicular directions, the calculated dissipation vanishes at high sound intensity because of the fully quantized spectrum. We show that the quantum regime of the attenuation can exist in high-mobility GaAs quantum wells where the heating can not destroy the quantum state. Typeset using REVTEX
منابع مشابه
Self-induced acoustic transparency in semiconductor quantum films.
We develop a quantum theory of the nonlinear interaction between intense surface acoustic waves and electrons in a quantum well in the regime of moving quantum wires and dots. In the quantum nonlinear regime, the sound attenuation exhibits quantum oscillations and dramatically decreases with increasing quantization. In the case of dynamically created electron dots formed by two acoustic waves, ...
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