Khrapai, V. S. and Ludwig, Stefan and Kotthaus, Jörg P. and Tranitz, Hans-Peter and Wegscheider, Werner (2008) Nonequilibrium interactions between two quantum circuits. Journal of Physics: Condensed Matter 20 (45), p. 454205.
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We briefly overview our recent results on nonequilibrium interactions between neighbouring electrically isolated nanostructures. One of the nanostructures is represented by an externally biased quantum point contact (drive-QPC), which is used to supply energy quanta to the second nanostructure (detector). Absorption of these nonequilibrium quanta of energy generates a dc current in the detector, or changes its differential conductance. We present results for a double quantum dot, a single quantum dot or a second QPC placed in the detector circuit. In all three cases a detection of quanta with energies up to ~1 meV is possible for bias voltages across the drive-QPC in the mV range. The results are qualitatively consistent with an energy transfer mechanism based on nonequilibrium acoustic phonons.
|Date:||12 November 2008|
|Institutions:||Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||01 Feb 2010 13:15|
|Last Modified:||20 Jul 2011 22:19|