Towards superlattices: Lateral bipolar multibarriers in graphene

Martin Drienovsky, Franz Xaver Schrettenbrunner, Andreas Sandner, Dieter Weiss, Jonathan Eroms, Ming Hao Liu, Fedor Tkatschenko, Klaus Richter

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)

摘要

We report on transport properties of monolayer graphene with a laterally modulated potential profile, employing striped top gate electrodes with spacings of 100 to 200 nm. Tuning of top and back gate voltages gives rise to local charge carrier density disparities, enabling the investigation of transport properties either in the unipolar (nn′) or the bipolar (np′) regime. In the latter, pronounced single- and multibarrier Fabry-Pérot (FP) resonances occur. We present measurements of different devices with different numbers of top gate stripes and spacings. The data are highly consistent with a phase coherent ballistic tight-binding calculation and quantum capacitance model, whereas a superlattice effect and modification of band structure can be excluded.

原文English
文章編號115421
期刊Physical Review B - Condensed Matter and Materials Physics
89
發行號11
DOIs
出版狀態Published - 2014 3月 17

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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