Quantum Hall Effect and Quantum Point Contact in Bilayer-Patched Epitaxial Graphene

Autor:	Chua, C. J., Connolly, M. R., Lartsev, A., Yager, T., Lara-Avila, S., Kubatkin, S., Kopylov, S., Fal'ko, V. I., Yakimova, R., Pearce, R., Janssen, T. J. B. M., Tzalenchuk, A. Ya., Smith, C. G.
Rok vydání:	2014
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Nano Letters, 2014, 14 (6), pp 3369-3373
Druh dokumentu:	Working Paper
DOI:	10.1021/nl5008757
Popis:	We study an epitaxial graphene monolayer with bilayer inclusions via magnetotransport measurements and scanning gate microscopy at low temperatures. We find that bilayer inclusions can be metallic or insulating depending on the initial and gated carrier density. The metallic bilayers act as equipotential shorts for edge currents, while closely spaced insulating bilayers guide the flow of electrons in the monolayer constriction, which was locally gated using a scanning gate probe. Comment: 5 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1405.5679 Zobrazit plný text záznamu View this record from Arxiv