Abstract:We report a set of resonantly enhanced defect modes in
the Raman
spectrum of molybdenum disulfide (MoS2) which are fully
analogous to the D mode of graphene, allowing sensitive defect quantification
and differentiation of zigzag and armchair edge structures. These
modes become active at edges under indirect resonance conditions at
785 nm excitation due to strict backscatter constraints in real and
reciprocal space, which exclusively select phonon wavevectors perpendicular
to the edge direction. We assign featu… Show more
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