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Control of Raman Scattering Quantum Interference Pathways in Graphene.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Chen, Xue 
Leng, Yu-Chen 
Lu, Yan 

Abstract

Graphene is an ideal platform to study the coherence of quantum interference pathways by tuning doping or laser excitation energy. The latter produces a Raman excitation profile that provides direct insight into the lifetimes of intermediate electronic excitations and, therefore, on quantum interference, which has so far remained elusive. Here, we control the Raman scattering pathways by tuning the laser excitation energy in graphene doped up to 1.05 eV. The Raman excitation profile of the G mode indicates its position and full width at half-maximum are linearly dependent on doping. Doping-enhanced electron-electron interactions dominate the lifetimes of Raman scattering pathways and reduce Raman interference. This will provide guidance for engineering quantum pathways for doped graphene, nanotubes, and topological insulators.

Description

Funder: European Commission


Funder: Digital, Industry and Space


Funder: European Research Council

Keywords

electron−electron interaction, electron−phonon coupling, graphite intercalation compounds, quantum interference, resonant Raman scattering

Journal Title

ACS Nano

Conference Name

Journal ISSN

1936-0851
1936-086X

Volume Title

17

Publisher

American Chemical Society (ACS)
Sponsorship
Engineering and Physical Sciences Research Council (EP/K01711X/1)
Engineering and Physical Sciences Research Council (EP/K017144/1)
Engineering and Physical Sciences Research Council (EP/L016087/1)
EPSRC (EP/X015742/1)