2006/11/30 by Moitri Maiti, K. Sengupta · 1 citation
Materials Science · Physics and Astronomy · #Graphene research and applications #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.76.054513
published as Phys. Rev. B 76, 054513 (2007) · 7 Pg., 6 Figs, extended version submitted to PRB
arxiv created 2007/05/10 · openalex publication_date 2007/08/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study Josephson effect in graphene superconductor/barrier/superconductor junctions with short and wide barriers of thickness d and width L, which can be created by applying a gate voltage V0 across the barrier region. We show that Josephson current in such graphene junctions, in complete contrast to their conventional counterparts, is an oscillatory function of both the barrier width d and the applied gate voltage V0. We also demonstrate that in the thin barrier limit, where V0\ensuremath→\ensuremath∞ and d\ensuremath→0 keeping V0d finite, such an oscillatory behavior can be understood in terms of transmission resonance of Dirac--Bogoliubov--de Gennes quasiparticles in superconducting graphene. We discuss experimental relevance of our work.