Edge magnetoplasmons in periodically modulated structures

Article

关键词: COMPOSITE FERMIONS;    MAGNETORESISTANCE OSCILLATIONS;    QUANTUM WIRES;    EXCITATIONS;    MAGNETOTRANSPORT;    DISPERSION;    TRANSPORT;    HELICONS;    ORBITS;    STATES;   

DOI  :  10.1103/PhysRevB.62.15834

来源: SCIE

【 摘 要 】

We present a microscopic treatment of edge magnetoplasmons (EMP's) within the random-phase approximation for strong magnetic fields, low temperatures, and filling factor v = 1(2), when a weak short-period superlattice potential is imposed along the Hall bar. The modulation potential modifies both the spatial structure and the dispersion relation of the fundamental EMP and leads, when the modulation potential is not too weak, to the appearance of a novel gapless mode of the fundamental EMP. For sufficiently weak modulation strengths the phase velocity of this novel mode is almost the same as the group velocity of the edge states but it should be quite smaller for stronger modulation. We discuss in detail the spatial structure of the charge density of the renormalized and the novel fundamental EMP's.

【 授权许可】

Free