Symmetry-Breaking Supercollisions in Landau-Quantized Graphene
Journal article, 2017

Recent pump-probe experiments performed on graphene in a perpendicular magnetic field have revealed carrier relaxation times ranging from picoseconds to nanoseconds depending on the quality of the sample. To explain this surprising behavior, we propose a novel symmetry-breaking defect-assisted relaxation channel. This enables scattering of electrons with single out-of-plane phonons, which drastically accelerate the carrier scattering time in low-quality samples. The gained insights provide a strategy for tuning the carrier relaxation time in graphene and related materials by orders of magnitude.


Florian Wendler

M. Mittendorff

J. C. Konig-Otto

S. Brem

Christian Berger

W. A. de Heer

R. Bottger

H. Schneider

M. Helm

S. Winnerl

Ermin Malic

Chalmers, Physics, Condensed Matter Theory

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 119 6 Article no 067405 -

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (FP7), 2013-10-01 -- 2016-03-31.

Subject Categories

Physical Sciences



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