Adiabatic pumping in a double-dot Cooper-pair beam splitter

Bastian Hiltscher, Michele Governale, Janine Splettstoesser, and Jürgen König
Phys. Rev. B 84, 155403 – Published 5 October 2011

Abstract

We study adiabatic pumping through a double quantum dot coupled to normal and superconducting leads. For this purpose a perturbation expansion in the tunnel coupling between the dots and the normal leads is performed and processes underlying the pumping current are discussed. Features of crossed Andreev reflection are investigated in the average pumped charge and related to local Andreev reflection in a single quantum dot. In order to distinguish Cooper-pair splitting from quasiparticle pumping, we compare the properties of Cooper-pair pumping with single-electron pumping in a system with only normal leads. The dependence on the average dot level and the coupling asymmetry turn out to be the main distinguishing features. This is contrasted with the linear conductance for which it is more difficult to distinguish single-particle from Cooper-pair transport.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 21 July 2011

DOI:https://doi.org/10.1103/PhysRevB.84.155403

©2011 American Physical Society

Authors & Affiliations

Bastian Hiltscher1, Michele Governale2, Janine Splettstoesser3, and Jürgen König1

  • 1Theoretische Physik, Universität Duisburg-Essen and CeNIDE, D-47048 Duisburg, Germany
  • 2School of Chemical and Physical Sciences and MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
  • 3Institut für Theorie der Statistischen Physik, RWTH Aachen University, D-52056 Aachen, and JARA-Fundamentals of Future Information Technology, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 84, Iss. 15 — 15 October 2011

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×