Control of Majorana Edge Modes by a g-factor Engineered Nanowire Spin Transistor

Amrit De; Alexey A. Kovalev

doi:10.1016/j.ssc.2013.08.004

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arXiv · 1310.5847

Control of Majorana Edge Modes by a g-factor Engineered Nanowire Spin Transistor

Amrit De·Alexey A. Kovalev

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Abstract

We propose the manipulation of Majorana edge states via hybridization and spin currents in a nanowire spin transistor. The spin transistor is based on a heterostructure nanowire comprising of semiconductors with large and small g-factors that form the topological and non-topological regions respectively. The hybridization of bound edge states results in spin currents and $4π$-periodic torques, as a function of the relative magnetic field angle -- an effect which is dual to the fractional Josephson effect. We establish relation between torques and spin-currents in the non-topological region where the magnetic field is almost zero and spin is conserved along the spin-orbit field direction. The angular momentum transfer could be detected by sensitive magnetic resonance force microscopy techniques.

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cond-mat.mes-hall cond-mat.mtrl-sci cond-mat.supr-con quant-ph

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Amrit De, Alexey A. Kovalev. 2013-10-22. Control of Majorana Edge Modes by a g-factor Engineered Nanowire Spin Transistor. https://doi.org/10.1016/j.ssc.2013.08.004

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