Topological charge pumping effect by the magnetization dynamics on the Surface of Three-Dimensional Topological Insulators

Abstract

We discuss a current dynamics on the surface of a 3-dimensional topological insulator induced by magnetization precession of a ferromagnet attached. It is found that the magnetization dynamics generates a direct charge current when the precession axis is within the surface plane. This rectification effect is due to a quantum anomaly and is topologically protected. The robustness of the rectification effect against first-varying exchange field and impurities is confirmed by explicit calculation.

6 pages, 4 figures

References in corpus (5)

• Topological Field Theory of Time-Reversal Invariant Insulators
• Surface quantized anomalous Hall current and magneto-electric effect in magnetically disordered topological insulators
• Conductivity of interacting massless Dirac particles in graphene: Collisionless regime
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