Title: Finger-gate manipulated quantum transport in Dirac materials
Authors: Kleftogiannis, Ioannis
Tang, Chi-Shung
Cheng, Shun-Jen
Department of Electrophysics
Keywords: quantum transport;Dirac materials;evanescent scattering
Issue Date: 27-May-2015
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.
URI: http://dx.doi.org/10.1088/0953-8984/27/20/205302
ISSN: 0953-8984
DOI: 10.1088/0953-8984/27/20/205302
Volume: 27
Issue: 20
Appears in Collections:Articles