Large intravalley scattering due to pseudo-magnetic fields in crumpled graphene

Péter Kun, Gergő Kukucska, Gergely Dobrik, János Koltai, J. Kürti, L. Bíró, L. Tapasztó, P. Nemes-Incze

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The pseudo-magnetic field generated by mechanical strain in graphene can have dramatic consequences on the behavior of electrons and holes. Here we show that pseudo-magnetic field fluctuations present in crumpled graphene can induce significant intravalley scattering of charge carriers. We detect this by measuring the confocal Raman spectra of crumpled areas, where we observe an increase of the D′/D peak intensity ratio by up to a factor of 300. We reproduce our observations by numerical calculation of the double resonant Raman spectra and interpret the results as experimental evidence of the phase shift suffered by Dirac charge carriers in the presence of a pseudo-magnetic field. This lifts the restriction on complete intravalley backscattering of Dirac fermions.

Original languageEnglish
Article number11
Journalnpj 2D Materials and Applications
Volume3
Issue number1
DOIs
Publication statusPublished - Dec 1 2019

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Graphite
Graphene
graphene
Scattering
Magnetic fields
Charge carriers
Raman scattering
charge carriers
scattering
magnetic fields
Raman spectra
Fermions
Backscattering
Phase shift
constrictions
backscattering
phase shift
fermions
Electrons
electrons

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics
  • Chemistry(all)

Cite this

Large intravalley scattering due to pseudo-magnetic fields in crumpled graphene. / Kun, Péter; Kukucska, Gergő; Dobrik, Gergely; Koltai, János; Kürti, J.; Bíró, L.; Tapasztó, L.; Nemes-Incze, P.

In: npj 2D Materials and Applications, Vol. 3, No. 1, 11, 01.12.2019.

Research output: Contribution to journalArticle

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