Finger-gate manipulated quantum transport in Dirac materials

Ioannis Kleftogiannis, Chi Shung Tang, Shun-Jen Cheng

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We investigate the quantum transport properties of multichannel nanoribbons made of materials described by the Dirac equation, under an in-plane magnetic field. In the low energy regime, positive and negative finger-gate potentials allow the electrons to make intra-subband transitions via hole-like or electron-like quasibound states (QBS), respectively, resulting in dips in the conductance. In the high energy regime, double dip structures in the conductance are found, attributed to spin-flip or spin-nonflip inter-subband transitions through the QBSs. Inverting the finger-gate polarity offers the possibility to manipulate the spin polarized electronic transport to achieve a controlled spin-switch.

Original languageEnglish
Article number205302
JournalJournal of Physics Condensed Matter
Volume27
Issue number20
DOIs
StatePublished - 27 May 2015

Keywords

  • Dirac materials
  • Evanescent scattering
  • Quantum transport

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