Electrical control of intervalley scattering in graphene via the charge state of defects
Mesoscale and Nanoscale Physics
2016-02-23 v1
Abstract
We study the intervalley scattering in defected graphene by low-temperature transport measurements. The scattering rate is strongly suppressed when defects are charged. This finding highlights "screening" of the short-range part of a potential by the long-range part. Experiments on calcium-adsorbed graphene confirm the role of a long-range Coulomb potential. This effect is applicable to other multivalley systems, provided that the charge state of a defect can be electrically tuned. Our result provides a means to electrically control valley relaxation and has important implications in valley dynamics in valleytronic materials.
Keywords
Cite
@article{arxiv.1602.06519,
title = {Electrical control of intervalley scattering in graphene via the charge state of defects},
author = {Baoming Yan and Qi Han and Zhenzhao Jia and Jingjing Niu and Tuocheng Cai and Dapeng Yu and Xiaosong Wu},
journal= {arXiv preprint arXiv:1602.06519},
year = {2016}
}
Comments
13 pages, 4 figures