Butterfly-like spectra and collective modes of antidot superlattices in magnetic fields

Article

关键词: BLOCH ELECTRONS;    LATERAL SUPERLATTICES;    MAGNETORESISTANCE;    MAGNETOTRANSPORT;    MAGNETOPLASMONS;    ARRAYS;    CHAOS;   

DOI  :  10.1103/PhysRevB.60.7744

来源: SCIE

【 摘 要 】

We calculate the energy band structure for electrons in an external periodic potential combined with a perpendicular magnetic field. Electron-electron interactions are included within a Hartree approximation. The calculated energy spectra display a considerable degree of self-similarity, just as the Hofstadter butterfly. However, screening affects the butterfly, most importantly the bandwidths oscillate with magnetic field in a characteristic way. We also investigate the dynamic response of the electron system in the far-infrared (FIR) regime. Some of the peaks in the FIR absorption spectra can be interpreted mainly in semiclassical terms, while others originate from inter(sub)band transitions. [S0163-1829(99)15435-3].

【 授权许可】

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