Published in

Wiley, physica status solidi (b) – basic solid state physics, 11(248), p. 2649-2652, 2011

DOI: 10.1002/pssb.201100326

Links

Tools

Export citation

Search in Google Scholar

Conductance fluctuations in graphene devices with superconducting contacts in different charge density regimes

Journal article published in 2011 by Frank Freitag, Jelena Trbovic, Christian Schönenberger
This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Orange circle
Postprint: archiving restricted
Red circle
Published version: archiving forbidden
Data provided by SHERPA/RoMEO

Abstract

Conductions fluctuations (CF) are studied in single layer graphene devices with superconducting source and drain contacts made from aluminium. The CF are found to be enhanced by superconductivity by a factor of 1.4-2. This (near) doubling of the CF indicates that the phase coherence length is l(phi)greater than or similar to L/2. As compared to previous work, we find a relatively weak dependence of the CF on the gate voltage, and hence on the carrier density. We also demonstrate that whether the CF are larger or smaller at the charge neutrality point (CNP) can be strongly dependent on the series resistance R(C), which needs to be subtracted. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim