Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 104: Transport: Molecular electronics (TT with CPP/HL/MA/O)

HL 104.4: Vortrag

Freitag, 20. März 2015, 10:15–10:30, H 0110

Thermo-voltage of nano-thermocouples — •Ayelet Ofarim, Bastian Kopp, Johannes Boneberg, Paul Leiderer, and Elke Scheer — University of Konstanz, Department of Physics, Konstanz, Germany

As the down-scaling of electronic components continues, engineering the devices has become a challenge, in particular in view of energy and heat management. Study of thermoelectric effects in nanostructures gives important additional information about charge transport, also regarding possible life-time limiting phenomena and applications for the conversion of light energy via heat into electrical energy. The scope of this presentation is to gain deep insight into the charge transport mechanism, by studying thermo-voltage effects of metallic atomic-sized contacts [1]. We present the concept for determination of the thermo-voltage of nano-thermocouples, using a novel mechanically-controlled break junction (MCBJ) mechanism. A technique to create and detect a temperature gradient, using laser irradiation, is also presented.

[1] B. Kopp, Z. Yi, D. Benner, F. Q. Xie, C. Obermair, T. Schimmel,

J. Bonenberg, P. Leiderer and E. Scheer,

Beilstein J. Nanotechnol. 3, 703 (2012).