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Published August 5, 2016 | Published + Supplemental Material
Journal Article Open

Cotunneling Drag Effect in Coulomb-Coupled Quantum Dots

Abstract

In Coulomb drag, a current flowing in one conductor can induce a voltage across an adjacent conductor via the Coulomb interaction. The mechanisms yielding drag effects are not always understood, even though drag effects are sufficiently general to be seen in many low-dimensional systems. In this Letter, we observe Coulomb drag in a Coulomb-coupled double quantum dot and, through both experimental and theoretical arguments, identify cotunneling as essential to obtaining a correct qualitative understanding of the drag behavior.

Additional Information

© 2016 American Physical Society. (Received 29 February 2016; published 4 August 2016) We are grateful to L. Peeters for discussions. This work was supported by the Gordon and Betty Moore Foundation Grant No. GBMF3429, the U.S.-Israel BSF Grants No. 2014014 and No. 2008149, the NSF under DMR-0906062, and the MINECO Grant No. FIS2014-52564. A. J. K. acknowledges an ABB Stanford Graduate Fellowship and an IQIM Postdoctoral Scholarship from the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (NSF Grant No. PHY-1125565).

Attached Files

Published - PhysRevLett.117.066602.pdf

Supplemental Material - supp.pdf

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