Regensburg 2013 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 52: Graphene: Characterization and devices (HL, jointly with MA, O, TT)

HL 52.1: Vortrag

Mittwoch, 13. März 2013, 09:30–09:45, H17

Polarization dependence of phonon modes in graphene nanoribbons — •Felix Kampmann1, Nils Scheuschner1, Bernat Terrés2,3, Christoph Stampfer2,3, and Janina Maultzsch11Institut für Festkörperphysik, TU Berlin, Hardenbergstraße 36, 10623 Berlin, Germany, EU — 2JARA-FIT and II. Institute of Physics B, RWTH Aachen University, Aachen, Germany, EU — 3Peter Grünberg Institute (PGI-6/8/9), Forschungszentrum Jülich, Jülich, Germany, EU

Polarization dependent Raman spectroscopy has lately been used to investigate the edge states of few layer graphene revealing insight into the selection rules of their Raman modes.

Here we report polarization dependent Raman measurements on single-layer graphene nanoribbons with varying width down to 30 nm.

We show that the cos2(θ) behavior of the intensity ratio I(D)/I(G) can be reproduced as it has already been known for the graphene edge states. Furthermore we found a similar behavior for I(D′)/I(G) and discuss the dependence on the nanoribbon width.

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