BOUNDARIES AND JUNCTIONS IN 2 PARITY-VIOLATING MODELS IN 2+1-DIMENSIONS

Article

关键词: MASSIVE GAUGE-THEORIES;    CHERN-SIMONS TERMS;    MAGNETIC-MOMENT;    DENSITY;    ANYONS;   

DOI  :  10.1103/PhysRevB.52.5052

来源: SCIE

【 摘 要 】

Recently it has been suggested that junctions between materials with different parity-violating properties would be characterized by diffusion layers, analogous to those in the pn junction. This remark is amplified by a fuller investigation of two related parity-violating effective Lagrangians, which possess a kind of duality. It is shown that gauge invariance and energy conservation are sufficient to determine the behavior at the interface. This leads to modifications of normal parity-violating electrodynamics. The coupling of an interface to an external system is a natural solution to the deficiencies of Maxwell-Chern-Simons theory. A heuristic model of a transistorlike device is discussed which relates to recent experiments in device technology. Radiative corrections to Chern-Simons theory induce a local magnetic moment interaction whose Lagrangian is everywhere gauge invariant. The effects of this interaction are compared to Maxwell-Chern-Simons theory. The dispersion of classical waves for these models is computed and the laws of reflection and refraction are found to hold despite the lack of P and T invariance. The magnetic moment dispersion is gapless in contrast to the Chern-Simons dispersion except in the case of a scalar held, which is covariantly constant. Both models exhibit optical activity (Faraday effect).

【 授权许可】

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