Electron-Electron Interaction in the Magnetoresistance of Graphene

Journal article
(Letter)


Publication Details

Author(s): Jobst J, Waldmann D, Gornyi I, Mirlin A, Weber HB
Journal: Physical Review Letters
Publisher: American Physical Society
Publication year: 2012
Volume: 108
Journal issue: 10
ISSN: 0031-9007


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.



FAU Authors / FAU Editors

Jobst, Johannes
Lehrstuhl für Angewandte Physik
Waldmann, Daniel
Lehrstuhl für Angewandte Physik
Weber, Heiko B. Prof. Dr.
Lehrstuhl für Angewandte Physik


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: 

Last updated on 2018-19-04 at 03:16