Accession Number:

AD1007164

Title:

CurrentPhase Relation in Graphene and Application to a Superconducting Quantum Interference Device

Descriptive Note:

Journal Article - Open Access

Corporate Author:

University of California, Berkeley Berkeley United States

Report Date:

2009-11-18

Pagination or Media Count:

4.0

Abstract:

Graphene exhibits unique electrical properties on account of its reduced dimensionality and neutrino-like massless Dirac fermion quasiparticle spectrum. When contacted with two superconducting electrodes, graphene can support Cooper pair transport, resulting in the well-known Josephson effect. The currentphase relation in a ballistic graphene Josephson junction is unique, and could provide a signature for the detection of ballistic Dirac fermions. This relation can be measured experimentally either directly via incorporation of graphene in an RF superconducting quantum interference device SQUID or indirectly via a dc-SQUID. We calculate the expected flux modulation of the switching current in the case of the dc-SQUID and compare the results to a previous experiment. Further experiments investigating the currentphase relation in graphene are promising for the observation of ballistic Dirac fermions

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE