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Title: Thermal energy and charge currents in multi-terminal nanorings

Abstract

We study in experiment and theory thermal energy and charge transfer close to the quantum limit in a ballistic nanodevice, consisting of multiply connected one-dimensional electron waveguides. The fabricated device is based on an AlGaAs/GaAs heterostructure and is covered by a global top-gate to steer the thermal energy and charge transfer in the presence of a temperature gradient, which is established by a heating current. The estimate of the heat transfer by means of thermal noise measurements shows the device acting as a switch for charge and thermal energy transfer. The wave-packet simulations are based on the multi-terminal Landauer-Büttiker approach and confirm the experimental finding of a mode-dependent redistribution of the thermal energy current, if a scatterer breaks the device symmetry.

Authors:
 [1];  [2]; ; ; ; ;  [1];  [3];  [4]
  1. Novel Materials Group, Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin (Germany)
  2. (Germany)
  3. Angewandte Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum (Germany)
  4. Optoelektronische Materialien und Bauelemente, Universität Paderborn, 33098 Paderborn (Germany)
Publication Date:
OSTI Identifier:
22611564
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ALUMINIUM ARSENIDES; CURRENTS; ELECTRONS; GALLIUM ARSENIDES; HEAT TRANSFER; NANOSTRUCTURES; NOISE; ONE-DIMENSIONAL CALCULATIONS; SIMULATION; SWITCHES; SYMMETRY; TEMPERATURE GRADIENTS; WAVE PACKETS; WAVEGUIDES

Citation Formats

Kramer, Tobias, Konrad-Zuse-Zentrum für Informationstechnik Berlin, 14195 Berlin, Kreisbeck, Christoph, Riha, Christian, E-mail: riha@physik.hu-berlin.de, Chiatti, Olivio, Buchholz, Sven S., Fischer, Saskia F., Wieck, Andreas D., and Reuter, Dirk. Thermal energy and charge currents in multi-terminal nanorings. United States: N. p., 2016. Web. doi:10.1063/1.4953812.
Kramer, Tobias, Konrad-Zuse-Zentrum für Informationstechnik Berlin, 14195 Berlin, Kreisbeck, Christoph, Riha, Christian, E-mail: riha@physik.hu-berlin.de, Chiatti, Olivio, Buchholz, Sven S., Fischer, Saskia F., Wieck, Andreas D., & Reuter, Dirk. Thermal energy and charge currents in multi-terminal nanorings. United States. doi:10.1063/1.4953812.
Kramer, Tobias, Konrad-Zuse-Zentrum für Informationstechnik Berlin, 14195 Berlin, Kreisbeck, Christoph, Riha, Christian, E-mail: riha@physik.hu-berlin.de, Chiatti, Olivio, Buchholz, Sven S., Fischer, Saskia F., Wieck, Andreas D., and Reuter, Dirk. Wed . "Thermal energy and charge currents in multi-terminal nanorings". United States. doi:10.1063/1.4953812.
@article{osti_22611564,
title = {Thermal energy and charge currents in multi-terminal nanorings},
author = {Kramer, Tobias and Konrad-Zuse-Zentrum für Informationstechnik Berlin, 14195 Berlin and Kreisbeck, Christoph and Riha, Christian, E-mail: riha@physik.hu-berlin.de and Chiatti, Olivio and Buchholz, Sven S. and Fischer, Saskia F. and Wieck, Andreas D. and Reuter, Dirk},
abstractNote = {We study in experiment and theory thermal energy and charge transfer close to the quantum limit in a ballistic nanodevice, consisting of multiply connected one-dimensional electron waveguides. The fabricated device is based on an AlGaAs/GaAs heterostructure and is covered by a global top-gate to steer the thermal energy and charge transfer in the presence of a temperature gradient, which is established by a heating current. The estimate of the heat transfer by means of thermal noise measurements shows the device acting as a switch for charge and thermal energy transfer. The wave-packet simulations are based on the multi-terminal Landauer-Büttiker approach and confirm the experimental finding of a mode-dependent redistribution of the thermal energy current, if a scatterer breaks the device symmetry.},
doi = {10.1063/1.4953812},
journal = {AIP Advances},
number = 6,
volume = 6,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}