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arXiv · 1201.1950

Effect of inplane electric field on magnetotransport in helical metal

Huazhou Wei·Sung-Po Chao·Vivek Aji
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Abstract

The existence of helical surface states in a bulk insulator, with anomalous magneto-electric properties, is a remarkable new development in solid state physics. The linear dispersion of the the fermions leads to a form of Lorentz invariance, with the Fermi velocity playing the role of the velocity of light ($c$). In a crossed electric and magnetic field the single particle states form Landau levels whose energies can be changed by varying the applied \emph{in-plane electric} field. The degeneracy remains constant and is determined by the magnetic field. In the letter we study the nature of the mangeto-oscillation in conductivity and thermopower as a function of the \emph{in-plane electric} field.

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Huazhou Wei, Sung-Po Chao, Vivek Aji. 2012-01-10. Effect of inplane electric field on magnetotransport in helical metal. https://doi.org/10.1103/physrevb.86.041403

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