Chirality-Dependent Hall Effect in Weyl Semimetals

Date

2015-10-09

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Publisher

Amer Physical Soc

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Abstract

We generalize a semiclassical theory and use the argument of angular momentum conservation to examine the ballistic transport in lightly doped Weyl semimetals, taking into account various phase-space Berry curvatures. We predict universal transverse shifts of the wave-packet center in transmission and reflection, perpendicular to the direction in which the Fermi energy or velocities change adiabatically. The anomalous shifts are opposite for electrons with different chirality, and they can be made imbalanced by breaking inversion symmetry. We discuss how to utilize local gates, strain effects, and circularly polarized lights to generate and probe such a chirality-dependent Hall effect.

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Keywords

Spin Hall Effect, Topological insulators, Crystals, Light, Weyl semimetals, Berry curvatures, Chirality

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S. A. Y. is supported by SUTD-SRG-EPD-2013062, and F. Z. is supported by UT Dallas research enhancement funds.

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©2015 American Physical Society

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