Electron-Electron Interaction in the Magnetoresistance of Graphene
Jobst J, Waldmann D, Gornyi I, Mirlin A, Weber HB (2012)
Publication Status: Published
Publication Type: Journal article, Letter
Publication year: 2012
Journal
Publisher: American Physical Society
Book Volume: 108
Journal Issue: 10
DOI: 10.1103/PhysRevLett.108.106601
Abstract
We investigate the magnetotransport in large area graphene Hall bars epitaxially grown on silicon carbide. In the intermediate field regime between weak localization and Landau quantization, the observed temperature-dependent parabolic magnetoresistivity is a manifestation of the electron-electron interaction. We can consistently describe the data with a model for diffusive ( magneto) transport that also includes magnetic-field-dependent effects originating from ballistic time scales. We find an excellent agreement between the experimentally observed temperature dependence of magnetoresistivity and the theory of electron-electron interaction in the diffusive regime. We can further assign a temperature-driven crossover to the reduction of the multiplet modes contributing to electron-electron interaction from 7 to 3 due to intervalley scattering. In addition, we find a temperature-independent ballistic contribution to the magnetoresistivity in classically strong magnetic fields.
Authors with CRIS profile
Johannes Jobst
Chair of Applied Physics
Daniel Waldmann
Chair of Applied Physics
Heiko Weber
Chair of Applied Physics
Additional Organisation(s)
Involved external institutions
Germany (DE)How to cite
APA:
Jobst, J., Waldmann, D., Gornyi, I., Mirlin, A., & Weber, H.B. (2012). Electron-Electron Interaction in the Magnetoresistance of Graphene. Physical Review Letters, 108(10). https://dx.doi.org/10.1103/PhysRevLett.108.106601
MLA:
Jobst, Johannes, et al. "Electron-Electron Interaction in the Magnetoresistance of Graphene." Physical Review Letters 108.10 (2012).
BibTeX: Download