Tunable electronic transport and unidirectional quantum wires in graphene subjected to electric and magnetic fields

Yury P. Bliokh, Valentin Freilikher, and Franco Nori
Phys. Rev. B 81, 075410 – Published 8 February 2010

Abstract

Magnetic barriers in graphene are not easily tunable. Here we show that the application of both electric and magnetic fields provides tunable and far more controllable electronic states in graphene. In particular, a one-dimensional channel (quantum wire) can be created, which supports localized electron-hole states with parameters tunable by the electric field. Such quantum wire offers peculiar conducting properties, such as unidirectional conductivity and robustness to disorder. Two separate quantum wires comprise a waveguide with two types of eigenmodes: one type is similar to traditional waveguides, the other type is formed by coupled surface waves propagating along the boundaries of the waveguide.

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  • Received 4 November 2009

DOI:https://doi.org/10.1103/PhysRevB.81.075410

©2010 American Physical Society

Authors & Affiliations

Yury P. Bliokh1,2, Valentin Freilikher1,3, and Franco Nori1,4

  • 1Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan
  • 2Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel
  • 3Jack and Pearl Resnick Institute of Advanced Technology, Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel
  • 4Department of Physics, University of Michigan, Ann Arbor, Michigan 48109–1040, USA

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Issue

Vol. 81, Iss. 7 — 15 February 2010

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