Dynamic Transport in a Quantum Wire Driven by Spin–Orbit Interaction

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Abstract

A gated one-dimensional (1D) quantum wire is considered, which is disturbed in a contactless manner by an alternating electric field produced by the tip of a scanning probe microscope. In this schematic, the 1D electrons are driven not by a pulling electric field but rather by a non-stationary spin–orbit interaction (SOI) created by the tip. It is shown that a charge current appears in the wire in the presence of the Rashba SOI produced by the gate net charge and image charges of 1D electrons induced on the gate (iSOI). The iSOI contributes to the charge susceptibility by breaking the spin–charge separation between the charge- and spin-collective excitations, generated by the probe. The velocity of the excitations is strongly renormalized by SOI, which opens a way to fine-tune the charge and spin response of 1D electrons by changing the gate potential. One of the modes softens upon increasing the gate potential to enhance the current response, as well as the power dissipated in the system.

Original languageEnglish (US)
Article number1700256
JournalPhysica Status Solidi - Rapid Research Letters
Volume11
Issue number12
DOIs
StatePublished - Dec 2017
Externally publishedYes

Bibliographical note

Funding Information:
I am grateful to Vladimir Sablikov for helpful discussions. This work was partially supported by Russian Foundation for Basic Research (Grant No. 17-02-00309) and Russian Academy of Sciences.

Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • quantum wires
  • scanning probe microscopy
  • spin-charge separation
  • spin–orbit interaction
  • strongly correlated electrons

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