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Symmetry-Breaking Supercollisions in Landau-Quantized Graphene

F. Wendler ; M. Mittendorff ; J. C. Konig-Otto ; S. Brem ; C. Berger ; W. A. de Heer ; R. Bottger ; H. Schneider ; M. Helm ; S. Winnerl ; Ermin Malic (Institutionen för fysik, Kondenserade materiens teori (Chalmers))
Physical Review Letters (0031-9007). Vol. 119 (2017), 6, p. Article no 067405 .
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2017-09-05. Senast ändrad 2017-09-07.
CPL Pubid: 251636

 

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Institutioner (Chalmers)

Institutionen för fysik, Kondenserade materiens teori (Chalmers)

Ämnesområden

Fysik

Chalmers infrastruktur

 


Projekt

Denna publikation är ett resultat av följande projekt:


Graphene-Based Revolutions in ICT And Beyond (GRAPHENE) (EC/FP7/604391)