Thermal energy and charge currents in multi-terminal nanorings

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4953812· OSTI ID:22611564

Kramer, Tobias ^[1]; Kreisbeck, Christoph; Riha, Christian; Chiatti, Olivio; Buchholz, Sven S.; Fischer, Saskia F. ^[1]; Wieck, Andreas D. ^[2]; Reuter, Dirk ^[3]

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1. Novel Materials Group, Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin (Germany)
2. Angewandte Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum (Germany)
3. Optoelektronische Materialien und Bauelemente, Universität Paderborn, 33098 Paderborn (Germany)

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.

• OSTI ID: 22611564
• Journal Information: AIP Advances, Vol. 6, Issue 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

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