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  Enhanced electron-phonon coupling in graphene with periodically distorted lattice

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.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-0790-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-B7F1-D
Genre: Journal Article

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cmd-2017-Pomarico-PhyRB.95.024304.pdf (Publisher version), 392KB
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cmd-2017-Pomarico-PhyRB.95.024304.pdf
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2017
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© American Physical Society

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https://dx.doi.org/10.1103/PhysRevB.95.024304 (Publisher version)
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Locator:
https://arxiv.org/abs/1607.02314 (Preprint)
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 Creators:
Pomarico, Enrico1, 2, Author              
Mitrano, Matteo1, 3, Author              
Bromberger, Hubertus1, Author              
Sentef, M. A.4, Author              
Al-Temimy, A.5, Author
Coletti, C.5, Author
Stöhr, A.6, Author
Link, S.6, Author
Starke, U.6, Author
Cacho, C.7, Author
Chapman, R.7, Author
Springate, E.7, Author
Cavalleri, Andrea1, 8, Author              
Gierz, Isabella9, Author              
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Laboratory for Ultrafast Microscopy and Electron Scattering, Institute of Physics, Ecole Polytechnique Federale de Lausanne (EPFL), ou_persistent22              
3Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois, ou_persistent22              
4Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
5Center for Nanotechnology at NEST, Istituto Italiano di Tecnologia, Pisa, ou_persistent22              
6Max Planck Institute for Solid State Research, Stuttgart, Germany, ou_persistent22              
7Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, United Kingdom, ou_persistent22              
8Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, United Kingdom, ou_persistent22              
9Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938295              

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Free keywords: Condensed Matter; Materials Science
 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.

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Language(s): eng - English
 Dates: 2016-07-082016-07-082017-01-132017-01-13
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.95.024304
arXiv: 1607.02314
 Degree: -

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Project name : Collaborative Research Centre SFB925, as well as the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement No. 696656-GrapheneCore1. Access to the Artemis facility at the Rutherford Appleton Laboratory was funded by STFC. E.P. acknowledges financial support from the Swiss National Science Foundation through an Advanced Postdoc Mobility Grant.
Grant ID : -
Funding program : Priority Program (SPP1459)
Funding organization : DFG
Project name : Collaborative Research Centre SFB925, as well as the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement No. 696656-GrapheneCore1. Access to the Artemis facility at the Rutherford Appleton Laboratory was funded by STFC. E.P. acknowledges financial support from the Swiss National Science Foundation through an Advanced Postdoc Mobility Grant.
Grant ID : 696656
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

Source 1

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Affiliations:
Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 95 (2) Sequence Number: 024304 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008