DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2015 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 39: Posters II (Topological insulators; Graphene; Spintronics and spin physics; Quantum information science)

HL 39.10: Poster

Tuesday, March 17, 2015, 14:00–20:00, Poster F

Optical spectroscopy on ultrathin NbSe2 and NbSe2-semiconductor heterostructures — •Sven Gelfert1, Nicola Paradiso1, Gerd Plechinger1, Philipp Nagler1, Philipp Tonndorf2, Steffen Michaelis de Vasconcellos2, Rudolf Bratschitsch2, Christoph Strunk1, Christian Schüller1, and Tobias Korn11Institut für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany — 2Physikalisches Institut, Westphälische Wilhelms-Universität Münster, 48149, Münster, Germany

NbSe2 is a layered transition metal dichalcogenide with a superconducting transition. By applying an exfoliation method, it can be thinned down to a few molecular layers and be transfered onto a Si/SiO2 substrate. We have produced NbSe2 flakes with "terraces" of different thickness down to the nanometer scale. In Raman measurements we observed a layer-dependent frequency shift in the characteristic phonon modes.

Furthermore, we have produced heterostructures by combining singlelayer WSe2 and MoSe2 with ultrathin NbSe2. In time-resolved photoluminescence experiments on these heterostructures we observed a dynamic charge transfer between the semiconducting layer and the adjacent NbSe2. We have analysed the photocarrier dynamics of both, isolated WSe2/MoSe2 single layers, and heterostructures, as a function of temperature.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2015 > Berlin