Electronic Bloch oscillation in bilayer graphene gradient superlattices
Mesoscale and Nanoscale Physics
2014-09-01 v2 Materials Science
Abstract
We investigate the electronic Bloch oscillation in bilayer graphene gradient superlattices using transfer matrix method. By introducing two kinds of gradient potentials of square barriers along electrons propagation direction, we find that Bloch oscillations up to terahertz can occur. Wannier-Stark ladders, as the counterpart of Bloch oscillation, are obtained as a series of equidistant transmission peaks, and the localization of the electronic wave function is also signature of Bloch oscillation. Forthermore, the period of Bloch oscillation decreases linearly with increasing gradient of barrier potentials.
Cite
@article{arxiv.1407.0580,
title = {Electronic Bloch oscillation in bilayer graphene gradient superlattices},
author = {Hemeng Cheng and Changan Li and Tianxing Ma and Li-Gang Wang and Yun Song and Hai-Qing Lin},
journal= {arXiv preprint arXiv:1407.0580},
year = {2014}
}
Comments
5 Pages, 7 Figures, and more discussions and references are added. Accepted for publication in Applied Physics Letters