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Counterflow of Electrons in Two Isolated Quantum Point Contacts

Khrapai, V. S. ; Ludwig, S. ; Kotthaus, Jörg P. ; Tranitz, Hans-Peter ; Wegscheider, Werner
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Date of publication of this fulltext: 25 Jan 2010 13:50


Abstract

We study the interaction between two adjacent but electrically isolated quantum point contacts (QPCs). At high enough source-drain bias on one QPC, the drive QPC, we detect a finite electric current in the second, unbiased, detector QPC. The current generated at the detector QPC always flows in the opposite direction than the current of the drive QPC. The generated current is maximal, if the ...

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