English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Enhanced electron-phonon coupling in graphene with periodically distorted lattice

MPS-Authors
/persons/resource/persons198350

Pomarico,  Enrico
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Laboratory for Ultrafast Microscopy and Electron Scattering, Institute of Physics, Ecole Polytechnique Federale de Lausanne (EPFL);

/persons/resource/persons133781

Mitrano,  Matteo
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois;

/persons/resource/persons133777

Bromberger,  Hubertus
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

/persons/resource/persons182604

Sentef,  M. A.
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

/persons/resource/persons133811

Cavalleri,  Andrea
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, United Kingdom;

/persons/resource/persons133795

Gierz,  Isabella
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

External Resource
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

cmd-2017-Pomarico-PhyRB.95.024304.pdf
(Publisher version), 392KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Pomarico, E., Mitrano, M., Bromberger, H., Sentef, M. A., Al-Temimy, A., Coletti, C., et al. (2017). Enhanced electron-phonon coupling in graphene with periodically distorted lattice. Physical Review B, 95(2): 024304. doi:10.1103/PhysRevB.95.024304.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-0790-0
Abstract
Electron-phonon coupling directly determines the stability of cooperative order in solids, including superconductivity, charge, and spin density waves. Therefore, the ability to enhance or reduce electron-phonon coupling by optical driving may open up new possibilities to steer materials’ functionalities, potentially at high speeds. Here, we explore the response of bilayer graphene to dynamical modulation of the lattice, achieved by driving optically active in-plane bond stretching vibrations with femtosecond midinfrared pulses. The driven state is studied by two different ultrafast spectroscopic techniques. First, terahertz time-domain spectroscopy reveals that the Drude scattering rate decreases upon driving. Second, the relaxation rate of hot quasiparticles, as measured by time- and angle-resolved photoemission spectroscopy, increases. These two independent observations are quantitatively consistent with one another and can be explained by a transient threefold enhancement of the electron-phonon coupling constant. The findings reported here provide useful perspective for related experiments, which reported the enhancement of superconductivity in alkali-doped fullerites when a similar phonon mode was driven.