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TT: Fachverband Tiefe Temperaturen

TT 17: Superconductivity: Tunnelling, Josephson Junctions, SQUIDs

TT 17.13: Vortrag

Montag, 31. März 2014, 18:15–18:30, HSZ 201

Correlated transport through junction arrays in the small Josephson energy limit: incoherent Cooper-pairs and hot electrons — Jared Cole¹, Juha Leppäkangas², and •Michael Marthaler³ — ¹Chemical and Quantum Physics, RMIT University, Melbourne — ²Department of Microtechnology and Nanoscience, Chalmers University of Technology — ³Institut für Theoretische Festkörperphysik, KIT, Karlsruhe

We study correlated transport in a Josephson junction array for small Josephson energies. In this regime transport is dominated by Cooper-pair hopping, although we observe that quasiparticles can not be neglected. We assume that the energy dissipated by a Cooper-pair is absorbed by the intrinsic impedance of the array. This allows us to formulate explicit Cooper-pair hopping rates without adding any parameters to the system. We show that the current is correlated and crucially, these correlations rely fundamentally on the interplay between the Cooper-pairs and equilibrium quasiparticles.