气候变化领域集成服务门户(CCPortal): Ballistic miniband conduction in a graphene superlattice

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DOI	10.1126/science.aaf1095
	Ballistic miniband conduction in a graphene superlattice
	Lee M.; Wallbank J.R.; Gallagher P.; Watanabe K.; Taniguchi T.; Fal'Ko V.I.; Goldhaber-Gordon D.
发表日期	2016
ISSN	0036-8075
起始页码	1526
结束页码	1529
卷号	353 期号:6307
英文摘要	Rational design of long-period artificial lattices yields effects unavailable in simple solids. The moiré pattern in highly aligned graphene/hexagonal boron nitride (h-BN) heterostructures is a lateral superlattice with high electron mobility and an unusual electronic dispersion whose miniband edges and saddle points can be reached by electrostatic gating. We investigated the dynamics of electrons in moiré minibands by measuring ballistic transport between adjacent local contacts in a magnetic field, known as the transverse electron focusing effect. At low temperatures, we observed caustics of skipping orbits extending over hundreds of superlattice periods, reversals of the cyclotron revolution for successive minibands, and breakdown of cyclotron motion near van Hove singularities. At high temperatures, electron-electron collisions suppress focusing. Probing such miniband conduction properties is a necessity for engineering novel transport behaviors in superlattice devices. © 2016, American Association for the Advancement of Science. All rights reserved.
英文关键词	graphene; boron; carbon; electrical conductivity; electron; lattice dynamics; magnetic field; temperature; Article; chemical structure; conductance; cyclotron; dispersion; electron; electronics; low temperature; magnetic field; oscillation; priority journal; temperature dependence
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244486
作者单位	Department of Physics, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, United States; National Graphene Institute, University of Manchester, Manchester, M13 9PL, United Kingdom; National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan; School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, United Kingdom
推荐引用方式 GB/T 7714	Lee M.,Wallbank J.R.,Gallagher P.,et al. Ballistic miniband conduction in a graphene superlattice[J],2016,353(6307).
APA	Lee M..,Wallbank J.R..,Gallagher P..,Watanabe K..,Taniguchi T..,...&Goldhaber-Gordon D..(2016).Ballistic miniband conduction in a graphene superlattice.Science,353(6307).
MLA	Lee M.,et al."Ballistic miniband conduction in a graphene superlattice".Science 353.6307(2016).