arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1102.3211cond-mat.mes-hallcond-mat.str-el
收藏

石墨烯中的可调谐电子相互作用和分数量子霍尔态

Tunable Electron Interactions and Fractional Quantum Hall States in Graphene

Z. Papic, R. Thomale, D. A. Abanin

摘要:

最近在石墨烯中发现的分数量子霍尔态提出了一个问题,即石墨烯及其双层的物理学是否在探索二维电子的强相关态方面比GaAs基材料具有任何优势。在这里,我们提出了一种方法来连续调整的有效电子相互作用的石墨烯及其双层的介电环境的样品。使用这种方法,突出的C3 H态,包括ν=1/3或ν=5/2态的电荷间隙可以增加数倍,或者一直减小到零。这种相互作用的可调谐性可以用来实现和稳定各种强关联相在CH 3 H制度,并探讨它们之间的转变。

英文摘要:

The recent discovery of fractional quantum Hall states in graphene raises the question of whether the physics of graphene and its bilayer offers any advantages over GaAs-based materials in exploring strongly-correlated states of two-dimensional electrons. Here we propose a method to continuously tune the effective electron interactions in graphene and its bilayer by the dielectric environment of the sample. Using this method, the charge gaps of prominent FQH states, including ν=1/3 or ν=5/2 states, can be increased several times, or reduced all the way to zero. The tunability of the interactions can be used to realize and stabilize various strongly correlated phases in the FQH regime, and to explore the transitions between them.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑