Document Type
Article
Department/Program
Physics
Journal Title
Physical Review Letters
Pub Date
8-2012
Volume
109
Issue
9
Abstract
We study quantum transport in Dirac materials with a single fermionic Dirac cone (strong topological insulators and graphene in the absence of intervalley coupling) in the presence of non-Gaussian long-range disorder. We show, by directly calculating numerically the conductance fluctuations, that in the limit of very large system size and disorder strength, quantum transport becomes universal. However, a systematic deviation away from universality is obtained for realistic system parameters. By comparing our results to existing experimental data on 1/f noise, we suggest that many of the graphene samples studied to date are in a nonuniversal crossover regime of conductance fluctuations.
Recommended Citation
Rossi, Enrico; Bardarson, J. H.; Fuhrer, M. S.; and Das Sarma, S., Universal Conductance Fluctuations in Dirac Materials in the Presence of Long-range Disorder (2012). Physical Review Letters, 109(9).
https://doi.org/10.1103/PhysRevLett.109.096801
DOI
https://doi.org/10.1103/PhysRevLett.109.096801
Publisher Statement
This work is made available for educational and personal use only. Copyright is credited to the authors. Any other uses should be directed to the publisher.
