Possible superconductivity in multi-layer-graphene by application of a gate voltage

A. Ballestar; P. Esquinazi; J. Barzola-Quiquia; S. Dusari; F. Bern; R. R. da Silva; Y. Kopelevich

Possible superconductivity in multi-layer-graphene by application of a gate voltage

Superconductivity 2014-02-04 v2 Strongly Correlated Electrons

Authors: A. Ballestar , P. Esquinazi , J. Barzola-Quiquia , S. Dusari , F. Bern , R. R. da Silva , Y. Kopelevich

Abstract

The carrier density in tens of nanometers thick graphite samples (multi-layer-graphene, MLG) has been modified by applying a gate voltage ( $V_g$ ) perpendicular to the graphene planes. Surface potential microscopy shows inhomogeneities in the carrier density ( $n$ ) in the sample near surface region and under different values of $V_g$ at room temperature. Transport measurements on different MLG samples reveal that under a large enough applied electric field these regions undergo a superconducting-like transition at $T \lesssim 17$ K. A magnetic field applied parallel or normal to the graphene layers suppresses the transition without changing appreciably the transition temperature.

Keywords

graphene electronic transport graphene transport and valleytronics graphene

Cite

@article{arxiv.1202.3327,
  title  = {Possible superconductivity in multi-layer-graphene by application of a gate voltage},
  author = {A. Ballestar and P. Esquinazi and J. Barzola-Quiquia and S. Dusari and F. Bern and R. R. da Silva and Y. Kopelevich},
  journal= {arXiv preprint arXiv:1202.3327},
  year   = {2014}
}

Comments

21 pages, 8 figures, will be published in Carbon (in press, 2014)

Possible superconductivity in multi-layer-graphene by application of a gate voltage

Abstract

Keywords

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