Charge and spin transport at the quantum Hall edge of graphene

Dmitry A. Abanin, Patrick A. Lee, Leonid S. Levitov

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

Landau level bending near the edge of graphene, described using a 2d Dirac equation, provides a microscopic framework for understanding the quantum Hall effect (QHE) in this material. We review properties of the QHE edge states in graphene, with emphasis on the novel phenomena that arise due to the Dirac character of electronic states. A method of mapping out the dispersion of edge states using scanning tunneling probes is proposed. The Zeeman splitting of Landau levels is shown to create a particularly interesting situation around the Dirac point, where it gives rise to counter-circulating modes with opposite spin. These chiral spin modes lead to a rich variety of spin transport phenomena, including the spin Hall effect, spin filtering and injection, and electric detection of spin current. The estimated Zeeman spin gap, enhanced by exchange, of a few hundred Kelvin, makes graphene an attractive system for spintronics. Comparison to recent transport measurements near ν = 0 is presented.

Original languageEnglish (US)
Pages (from-to)77-85
Number of pages9
JournalSolid State Communications
Volume143
Issue number1-2
DOIs
StatePublished - Jul 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry

Keywords

  • A. Graphite
  • D. Edge states
  • D. Quantum Hall effect
  • D. Spin transport

Fingerprint

Dive into the research topics of 'Charge and spin transport at the quantum Hall edge of graphene'. Together they form a unique fingerprint.

Cite this