Optical Measurement of the Phase-Breaking Length in Graphene
arXiv:1008.1563 · doi:10.1021/nl104134a
Abstract
In mesoscopic physics, interference effects play a central role on the transport properties of conduction electrons, giving rise to exotic phenomena such as weak localization, Aharonov-Bohm effect, and universal conduction fluctuations. Mesoscopic objects have a size on the order of the {\em phase-breaking length} , the length conduction electrons travel while keeping phase coherence. In this letter, we use vibrational spectroscopy in combination with a novel optical defocusing method to measure of photo-excited electrons in graphene which undergo inelastic scattering by optical phonons. We extract from the spatial confinement of the defect-induced Raman D band near the edges of graphene. Temperature dependent measurements in the range of 1.55\,K to 300\,K yield , in agreement with previous magneto-transport measurements.
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- Defect Sizing, Separation and Substrate Effects in Ion-Irradiated Monolayer 2D Materials
- Interplay between energy dissipation and reservoir-induced thermalization in nonequilibrium quantum nanodevices
- Effect of Topological Non-hexagonal Rings and Stone Wale Defects on the Vibrational Response of Single and Multi-Layer Ion Irradiated Graphene
- Theory of Graphene Raman Spectroscopy
- Quantitative principles for precise engineering of sensitivity in carbon-based electrochemical sensors
- Doping dependence of the Raman spectrum of defected graphene