• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Physics Communications >Formation of the n=0 Landau level in hybrid graphene
【24h】

Formation of the n=0 Landau level in hybrid graphene

机译：杂化石墨烯中n = 0 Landau能级的形成

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The minimum of 4-terminal conductance occurring as carrier density is tuned through its charge neutral point has proven to be a robust empirical feature of graphene, persisting with changes to temperature, applied magnetic field, substrate, and layer thickness, though the theoretical mechanisms involved in transport about this point--vanishing density of states, conventional band gap opening, and broken-symmetry quantum Hall mobility gaps--vary widely depending on the regime. In this paper, we report on observations of a regime where the 4-terminal conductance minimum ceases to exist: transport in monolayer graphene connected to bilayer graphene during the onset of the quantum Hall effect. This observed increase in conductance is accompanied by decreases in conductance at the half-filling of the Landau levels adjacent to the charge-symmetric, zero-energy level. As monolayer and bilayer graphene have distinct zero-energy levels that form about the charge neutral point, our observations suggest that competitions between the differing many-body orderings of these states as they emerge may underlie these anomalous conductances.
机译：通过载流子密度通过其电荷中性点进行调节时出现的最小4端电导率已被证明是石墨烯的强大经验特性，尽管涉及理论机制，但仍会随温度，施加的磁场，衬底和层厚度的变化而持续存在大约在这一点上的传输-状态的消失，常规带隙的打开以及对称对称的量子霍尔迁移率间隙的缺失-在很大程度上取决于该机制。在本文中，我们报告了对一种机制的观察，该机制中4端电导的最小值不再存在：在量子霍尔效应发生期间，与双层石墨烯相连的单层石墨烯中的迁移。这种观察到的电导率的增加伴随着在朗道电导率水平的一半填充处电导率的下降，该电导率与电荷对称的零能级相邻。由于单层和双层石墨烯在电荷中性点附近形成不同的零能级，因此我们的观察表明，这些状态的不同多体有序之间的竞争可能是这些异常电导的基础。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号