Quantized electron transport through graphene nanoconstrictions
Abstract
We study the quantization of Dirac fermions in lithographically defined graphene nanoconstrictions. We observe quantized conductance in single nanoconstrictions fabricated on top of a thin hexamethyldisilazane layer over a Si/SiO_2 wafer. This nanofabrication method allows us to obtain well defined edges in the nanoconstrictions, thus reducing the effects of edge roughness on the conductance. We prove the occurrence of ballistic transport and identify several size quantization plateaus in the conductance at low temperature. Experimental data and numerical simulations show good agreement, demonstrating that the smoothing of the plateaus is not related to edge roughness but to quantum interference effects.
Cite
@article{arxiv.1802.09762,
title = {Quantized electron transport through graphene nanoconstrictions},
author = {V. Clerico and J. A. Delgado-Notario and M. Saiz-Bretin and C. H. Fuentevilla and A. V. Malyshev and J. D. Lejarreta and E. Diez and F. Dominguez-Adame},
journal= {arXiv preprint arXiv:1802.09762},
year = {2018}
}
Comments
Accepted for publication in physica status solidi (a)