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.
@article{arxiv.1410.5909,
title = {Finger-gate manipulated quantum transport in Dirac materials},
author = {Ioannis Kleftogiannis and Chi-Shung Tang and Shun-Jen Cheng},
journal= {arXiv preprint arXiv:1410.5909},
year = {2015}
}
Comments
14 pages, 6 figures, some revisions/updates, published on JPCM