Vortex detection and quantum transport in mesoscopic graphene Josephson junction arrays
نویسندگان
چکیده
C. L. Richardson, S. D. Edkins, G. R. Berdiyorov, C. J. Chua, J. P. Griffiths, G. A. C. Jones, M. R. Buitelaar, V. Narayan, F. Sfigakis, C. G. Smith, L. Covaci, M. R. Connolly Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, UK Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, 2020 Antwerpen, Belgium Qatar Environment and Energy Research Institute, Doha, Qatar Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK and National Physical Laboratory, Hampton Road, Teddington TW11 0LW, UK (Dated: March 30, 2015)
منابع مشابه
One-Dimensional Localization of Quantum Vortices in Disordered Josephson Junction Arrays.
The influence of disorder on the transport of quantum vortices in one-dimensional arrays of Josephson junctions was studied experimentally. The vortices localize in disordered arrays for small vortex densities resulting in a vanishing transport at low temperatures, whereas, in a periodic array, transport remains possible. For large vortex densities the mobility of vortices is maintained in the ...
متن کاملQuantum Phase Transitions and Vortex Dynamics in Superconducting Networks
Josephson-junction arrays are ideal model systems to study a variety of phenomena such as phase transitions, frustration effects, vortex dynamics and chaos. In this review, we focus on the quantum dynamical properties of lowcapacitance Josephson-junction arrays. The two characteristic energy scales in these systems are the Josephson energy, associated with the tunneling of Cooper pairs between ...
متن کاملOne-Dimensional Mott Insulator Formed by Quantum Vortices in Josephson Junction Arrays.
The quantum transport of vortices in very long and narrow arrays of small Josephson junctions has been studied experimentally. The chemical potential of the system can be changed by an external magnetic field. When the vortex density is commensurate with the one-dimensional junction lattice, the vortex mobility vanishes for a finite window of the magnetic field. The localization of the vortices...
متن کاملDuality in Josephson Junction Arrays
Various properties of mesoscopic two-dimensional Josephson junction arrays are reviewed. Particular attention is paid to structure of the topological excitations, charges and vortices, which are shown to be dual to each other. This duality persists in the presence of external magnetic fields and offset charges, which influence vortices and charges in an equivalent way. A double-layer junction a...
متن کاملVortex motion rectification in Josephson junction arrays with a ratchet potential.
By means of electrical transport measurements we have studied the rectified motion of vortices in ratchet potentials engineered on overdamped Josephson junction arrays. The rectified voltage as a function of the vortex density shows a maximum efficiency close a matching condition to the period of the ratchet potential indicating a collective vortex motion. Vortex current reversals were detected...
متن کامل