Spatially resolved thermoelectric effects in operando semiconductor–metal nanowire heterostructures
Autor: | Masiar Sistani, Alois Lugstein, Bernd Gotsmann, Nadine Gächter, Marilyne Sousa, Philipp Staudinger, Maximilian G. Bartmann, Fabian Könemann |
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Rok vydání: | 2020 |
Předmět: |
010302 applied physics
Materials science business.industry Nanowire chemistry.chemical_element Germanium 02 engineering and technology Substrate (electronics) Scanning thermal microscopy 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Semiconductor Thermal conductivity chemistry 0103 physical sciences Thermoelectric effect Optoelectronics Interfacial thermal resistance General Materials Science 0210 nano-technology business |
Zdroj: | Nanoscale |
Popis: | The thermoelectric properties of a nanoscale germanium segment connected by aluminium nanowires are studied using scanning thermal microscopy. The germanium segment of 168 nm length features atomically sharp interfaces to the aluminium wires and is surrounded by an Al2O3shell. The temperature distribution along the self-heated nanowire is measured as a function of the applied electrical current, for both Joule and Peltier effects. An analysis is developed that is able to extract the thermal and thermoelectric properties including thermal conductivity, the thermal boundary resistance to the substrate and the Peltier coefficient from a single measurement. Our investigations demonstrate the potential of quantitative measurements of temperature around self-heated devices and structures down to the scattering length of heat carriers. |
Databáze: | OpenAIRE |
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