期刊
PHYSICAL REVIEW B
卷 82, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.125441
关键词
-
资金
- Hungarian Scientific Research Funds [K72613, CNK80991]
- Hungarian Academy of Sciences
- New Hungary Development Plan [TAMOP-4.2.1/B-09/1/KMR-2010-0002]
- Juan de la Cierva Program (MCI, Spain)
- Estimulo a Investigacao Program (Fundacao Calouste Gulbenkian, Portugal)
The gap in bilayer graphene (BLG) can directly be controlled by a perpendicular electric field. By tuning the field through zero at a finite rate in neutral BLG, excited states are produced. Due to screening, the resulting dynamics is determined by coupled nonlinear Landau-Zener models. The generated defect density agrees with Kibble-Zurek theory in the presence of subleading logarithmic corrections. After the quench, population inversion occurs for wave vectors close to the Dirac point. This could, at least, in principle, provide a coherent source of infrared radiation with tunable spectral properties (frequency and broadening). Cold atoms with quadratic band crossing exhibit the same dynamics.
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