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Noninvasive probes of charge fractionalization in quantum spin Hall insulators

机译:量子自旋霍尔绝缘体中电荷分级的无创探针

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摘要

When an electron with well-defined momentum tunnels into a nonchiral Luttinger liquid, it breaks up into two separate wave packets that carry fractional charges and move in opposite directions. A direct observation of this phenomenon has proven elusive, mainly due to single-particle and plasmon backscattering caused by measurement probes. This paper theoretically introduces two topological insulator devices that are naturally suited for detecting fractional charges and their velocities directly and in a noninvasive fashion.
机译:当具有明确动量的电子隧穿到非手性Luttinger液体中时,它会分解成两个独立的波包,这些波包携带分数电荷并朝相反的方向移动。对这种现象的直接观察已被证明难以捉摸,这主要是由于测量探针引起的单粒子和等离子体激元反向散射。本文从理论上介绍了两种拓扑绝缘体设备,它们自然适合于直接且以非侵入方式检测分数电荷及其速度。

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