Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 17: Low-Dimensional Systems: Oxide Hetero-Interfaces

TT 17.8: Vortrag

Montag, 7. März 2016, 17:00–17:15, H22

Engineering the work function of oxide heterostructures — •Zhicheng Zhong and Philipp Hansmann — Max-Planck Institute for Solid State Research

The design of novel materials for new functionality that push the frontiers of technology is one of the most important challenges in electronic structure calculations. One specific technology, still in its infancy, presents an alternative to thermoelectric conversion of heat to electrical energy and was coined as the thermoelectronic approach. The key components of a thermoelectronic device are an electron emitter and an electron collector separated by a vacuum. The creation of an electron current in the vacuum and the efficiency of the device crucially depends on the absolute value and the ratio of the work functions of emitter and collector material. In our study we investigate work functions of various transition metal oxide surfaces and how we can tune the work function by manipulating the surface by heterostructuring.