Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 79: Poster: New Materials
HL 79.2: Poster
Donnerstag, 23. März 2017, 15:00–19:00, P2-OG3
Comparison of the electrical conductivity between H terminated and heated electronic grade diamonds — •Sven Graus1, Stefan Borgsdorf1, Ulrich Köhler1, Nikolas Wöhrl2, Dennis Oing2, Volker Buck2, Tanmoy Chakraborty3, and Dieter Suter3 — 1Experimentalphysik IV, AG Oberflächen, Ruhr- Universität Bochum, Germany — 2Experimentalphysik, AG Lorke, Universität Duisburg-Essen, Germany — 3Experimentelle Physik IIIA, Technische Universität Dortmund, Germany
Color centers in diamond, especially nitrogen vacancy (NV) centers, are practical single photon emitters due to RT operation and are candidates for applications in quantum computing and are elements for quantum information technologies. We create the NV centers with low energy nitrogen implantation in electronic grade diamonds. To prevent charging effects on the surface which defocus the ion beam it is common to use hydrogen terminated diamonds. The termination in combination with water adsorbates leads to a surface conductivity which is induced by a two dimensional hole gas (2DHG) close to the surface. For implantation experiments at high temperatures (up to 900 °C) the termination and also the 2DHG is destroyed but the conductivity induced by charge carriers from boron impurities and intrinsic charge carries is rising with the temperature. We compared the conductivity by van der Pauw measurements of the terminated diamond at RT and the diamond at 900 °C in UHV. The appearance of any defocusing effects on the hot diamond while implantation were also checked.