Journal
EPL
Volume 79, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/79/57003
Keywords
-
Categories
Ask authors/readers for more resources
We have studied numerically the mesoscopic. fluctuations of the conductance of a graphene strip ( width W larger than length L), in an ensemble of samples with different realizations of the random electrostatic potential landscape. For strong disorder ( potential fluctuations comparable to the hopping energy), the variance of the conductance approximates the value predicted by the Altshuler- Lee- Stone theory of universal conductance fluctuations, VarG(UCF) = 0.12 ( W/ L)(2e(2)/ h)(2). For weaker disorder the variance is greatly enhanced if the potential is smooth on the scale of the atomic separation. There is no enhancement if the potential varies on the atomic scale, indicating that the absence of backscattering on the honeycomb lattice is at the origin of the anomalously large fluctuations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available