Spatially resolved thermoelectric effects in operando semiconductor–metal nanowire heterostructures. Issue 40 (8th October 2020)

• Record Type: Journal Article
• Authors: Gächter, Nadine; Könemann, Fabian; Sistani, Masiar; Bartmann, Maximilian G.; Sousa, Marilyne; Staudinger, Philipp; Lugstein, Alois; Gotsmann, Bernd
• Is Part Of: Nanoscale. Volume 12:Issue 40(2020)
• Page Start: 20590
• Page End: 20597
• Publication Date: 2020-10-08
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d0nr05504b
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : The thermoelectric properties of a nanoscale germanium segment connected by aluminium nanowires are studied using scanning thermal microscopy. Abstract : 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 Al2 O3 shell. 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.