Nonergodicity and microscopic symmetry breaking of the conductance fluctuations in disordered mesoscopic graphene

G. Bohra, R. Somphonsane, N. Aoki, Y. Ochiai, R. Akis, D. K. Ferry, J. P. Bird

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We show a dramatic deviation from ergodicity for the conductance fluctuations in graphene. In marked contrast to the ergodicity of dirty metals, fluctuations generated by varying magnetic field are shown to be much smaller than those obtained when sweeping Fermi energy. They also exhibit a strongly anisotropic response to the symmetry-breaking effects of a magnetic field, when applied perpendicular or parallel to the graphene plane. These results reveal a complex picture of quantum interference in graphene, whose description appears more challenging than for conventional mesoscopic systems.

Original languageEnglish (US)
Article number161405
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number16
DOIs
StatePublished - Oct 15 2012

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Graphene
broken symmetry
graphene
Magnetic fields
Fermi level
magnetic fields
Metals
deviation
interference
metals
energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Nonergodicity and microscopic symmetry breaking of the conductance fluctuations in disordered mesoscopic graphene. / Bohra, G.; Somphonsane, R.; Aoki, N.; Ochiai, Y.; Akis, R.; Ferry, D. K.; Bird, J. P.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 86, No. 16, 161405, 15.10.2012.

Research output: Contribution to journalArticle

Bohra, G. ; Somphonsane, R. ; Aoki, N. ; Ochiai, Y. ; Akis, R. ; Ferry, D. K. ; Bird, J. P. / Nonergodicity and microscopic symmetry breaking of the conductance fluctuations in disordered mesoscopic graphene. In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 86, No. 16.
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