Microwave-induced resonant reflection and localization of ballistic electrons in quantum microchannels

SURFACE SCIENCE

卷:361

Article; Proceedings Paper

Gorelik, LY ; Jonson, M ; Shekhter, RI

关键词: electron-solid interactions;    scattering, diffraction;    models of non-linear phenomena;    photoconductivity;    semiconductor-semiconductor heterostructures;   

DOI  :  10.1016/0039-6028(96)00495-5

来源: Elsevier

【 摘 要 】

We show that electron transport in a ballistic microchannel supporting both propagating and reflected modes can be completely blocked by applying a microwave electromagnetic field. The effect is due to resonant reflection caused by multiple coherent electron-photon scattering involving at least two spatially localized scattering centers in the channel. With many such scattering center present the conductance is shown to have an irregular dependence on bias voltage, gate voltage and frequency wit irregularities spaced dips corresponding to resonant reflection. When averaged over bias, gate voltage or frequency the conductance will decay exponentially with channel length in full analogy with the localization of 1D electrons caused by impurity scattering.

【 授权许可】

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