Dresden 2014 – wissenschaftliches Programm
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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.