INEQUIVALENCE OF WEAK-LOCALIZATION AND COHERENT BACKSCATTERING

Article

关键词: UNIVERSAL CONDUCTANCE FLUCTUATIONS;    DISORDERED MEDIA;    RESISTANCE FLUCTUATIONS;    SCALING THEORY;    2 DIMENSIONS;    SCATTERING;    LIGHT;    CONDUCTIVITY;    GEOMETRY;   

DOI  :  10.1103/PhysRevB.50.8230

来源: SCIE

【 摘 要 】

We define a current-conserving approximation for the local conductivity tenser of a disordered system which includes the effects of weak localization. Using this approximation we show that the weak localization effect in conductance is not obtained simply from the diagram corresponding to the coherent backscattering peak observed in optical experiments. Other diagrams contribute to the effect at the same order and decrease its value. These diagrams appear to have no semiclassical analogues, a fact which may have implications for the semiclassical theory of chaotic systems. The effects of discrete symmetries on weak localization in disordered conductors are evaluated and compared to results from chaotic scatterers.

【 授权许可】

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