期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.037403
关键词
-
资金
- UCSD
- U. S. DOE [DEFG0300ER45799]
- Research at Columbia University [DE-AIO2-04ER46133, DE-FG02-05ER46215]
- NSF [DMR-0352738, CHE-0117752]
- NYSTAR
- Keck Foundation
- Office of Science, Office of Basic Energy Sciences, of the U. S. Department of Energy [DE-AC0205CH11231]
We report on infrared spectroscopy of bilayer graphene integrated in gated structures. We observe a significant asymmetry in the optical conductivity upon electrostatic doping of electrons and holes. We show that this finding arises from a marked asymmetry between the valence and conduction bands, which is mainly due to the inequivalence of the two sublattices within the graphene layer and the next-nearest-neighbor interlayer coupling. From the conductivity data, the energy difference of the two sublattices and the interlayer coupling energy are directly determined.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据