Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 67: Graphene-like Materials: Silicene, MoS2 and Relatives (HL jointly with DY, MA, O, TT)
O 67.6: Vortrag
Donnerstag, 3. April 2014, 11:30–11:45, POT 081
Resonant Inelastic Light Scattering on MoS2 — •Bastian Miller, Eric Parzinger, Alexander Holleitner, and Ursula Wurstbauer — Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching (Germany)
Two-dimensional layered ’van-der Waals’ materials are of increasing interest for fundamental research due to their peculiar band-structure.
We utilize inelastic light scattering - a contactless and extremely versatile tool - to study phonon excitation spectra of mono- and fewlayer MoS2. The phonon modes are unique fingerprints of the material properties and are sensitive to defects, strain, doping and the number of MoS2 -layers.
We observe signatures of multistep scattering processes involving phonon-phonon, electron-phonon as well as electronic excitations under resonant conditions, where the incoming or outgoing light meets the energy of a fundamental optical transition of the system.