A controllable valley polarization in Graphene
Abstract
The electron transport of different conical valleys is investigated in graphene with extended line-defects. Intriguingly, the electron with a definite incident angle can be completely modulated into one conical valley by a resonator which consists of several paralleling line-defects. The related incident angle can be controlled easily by tuning the parameters of the resonator. Therefore, a controllable 100% valley polarization, as well as the detection of the valley polarization, can be realized conveniently by tuning the number of line-defects and the distance between two nearest neighbouring line-defects. This fascinating finding opens a way to realize the valley polarization by line-defects. With the advancement of experimental technologies, this resonator is promising to be realized and thus plays a key role in graphene valleytronics.
Cite
@article{arxiv.1303.0804,
title = {A controllable valley polarization in Graphene},
author = {Yang Liu and Juntao Song and Yuxian Li and Ying Liu and Qing-feng Sun},
journal= {arXiv preprint arXiv:1303.0804},
year = {2013}
}
Comments
8 pages, 8 figures