Current Modulator based on Topological Insulator with Sliding Magnetic Superlattice

Details Current Modulator based on Topological Insulator with Sliding Magnetic Superlattice Current Modulator based on Topological Insulator with Sliding Magnetic Superlattice

2010-02-04

arxiv.org/abs/1002.0947v1

Phys. Rev. B 81, 193302 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 6 figures

Scientific paper

10.1103/PhysRevB.81.193302

We study theoretically the surface of a topological insulator with a sliding magnetic superlattice coated above. By analyzing time-dependent Dirac equations, the dynamics of the zero mode is investigated. When the superlattice's sliding velocity is smaller (larger) than the Fermi velocity of topological insulator, the zero mode is perfectly (imperfectly) pumped. We also propose the application of this setup, which rectifies currents or generates pulse currents. It would provide a prototype of electronic devices based on topological insulator.

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