FANO RESONANCES IN QUASI-ONE-DIMENSIONAL ELECTRON WAVE-GUIDES

Article

关键词: QUANTUM POINT CONTACT;    WAVE-GUIDES;    CONDUCTANCE;    TRANSMISSION;    TRANSPORT;    SCATTERING;    WIRE;    IMPURITIES;    EVOLUTION;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.48.2553

来源: SCIE

【 摘 要 】

In the spectroscopy of atoms and molecules, an asymmetric Fano resonance arises whenever a bound state associated with one electronic configuration is coupled to the ionization continuum of a different configuration. A strikingly similar resonance appears for electronic transport in conductors with more than one subband, independent of the specific details of the system under study. We develop a two-subband approximation which describes the Fano resonances for conduction through an electron waveguide containing donor impurities, for GAMMA-X-GAMMA intervalley tunneling in a GaAs/AlxGa1-xAs/GaAs heterojunction, and for an electron waveguide coupled to a resonant cavity. Interference between the direct and intersubband transmission channels gives rise to the asymmetric Fano resonance.

【 授权许可】

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