Cyclotron resonance in antidot arrays

Article

关键词: 2-DIMENSIONAL ELECTRON-GAS;    COLLECTIVE EXCITATIONS;    ELECTROMAGNETIC RESPONSE;    MAGNETORESISTANCE;    MAGNETOTRANSPORT;    LOCALIZATION;    CONDUCTIVITY;    OSCILLATIONS;    TRANSPORT;    DYNAMICS;   

DOI  :  10.1103/PhysRevB.65.125326

来源: SCIE

【 摘 要 】

We study the dynamical properties of an electron gas scattered by impenetrable antidots in the presence of a strong magnetic field. We find that the line shape of the cyclotron resonance is very different from the Lorentzian and is not characterized by the Drude scattering rate. We show that the dissipative dynamical response of skipping orbits, S-c(omega), is broadened on a scale of the cyclotron frequency omega(c) and has a sharp dip proportional to\omega-omega(c)\. For small antidots, S-c(omega) is strongly modulated with a period equal to omega(c) and has sharp square-root singularities for a series of resonant frequencies. For large antidots, S-c(omega) has a hard gap at omega

【 授权许可】

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