Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 88: Graphene-like materials: Silicene, MoS2 and relatives (with DY/MA/O/TT)

HL 88.6: 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.

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