Alternating current Josephson effect in superconductorgraphenesuperconductor junctions

G. J. Xu, B. H. Wu, and J. C. Cao We investigate the ac Josephson effect in superconductorgraphenesuperconductor (SGS) junctions by using the FloquetGreen's function formalism to solve the DiracBogoliubovde Gennes equation. The numerical results show rich subharmonic gap structures such as the negative differential conductance (NDC) ... [J. Appl. Phys. 109, 083704 (2011)] published Tue Apr 19, 2011.