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

Autor:	Ballestar, A., Esquinazi, P., Barzola-Quiquia, J., Dusari, S., Bern, F., da Silva, R. R., Kopelevich, Y.
Rok vydání:	2012
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
Popis:	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. Comment: 21 pages, 8 figures, will be published in Carbon (in press, 2014)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1202.3327 Zobrazit plný text záznamu View this record from Arxiv