Thermally driven ballistic rectifer

Details Thermally driven ballistic rectifer Thermally driven ballistic rectifer

2011-07-15

arxiv.org/abs/1107.3179v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures; minor to moderate clarifications and simplifications in v2

Scientific paper

The response of electric devices to an applied thermal gradient has, so far, been studied almost exclusively in two-terminal devices. Here we present measurements of the response to a thermal bias of a four-terminal, quasi-ballistic junction with a central scattering site. We find a novel transverse thermovoltage measured across isothermal contacts. Using a multi-terminal scattering model extended to the weakly non-linear voltage regime, we show that the device's response to a thermal bias can be predicted from its nonlinear response to an electric bias. Our approach forms a foundation for the discovery and understanding of advanced, nonlocal, thermoelectric phenomena that in the future may lead to novel thermoelectric device concepts.

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