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  Phonon-Pump Extreme-Ultraviolet-Photoemission Probe in Graphene: Anomalous Heating of Dirac Carriers by Lattice Deformation

Gierz, I., Mitrano, M., Bromberger, H., Cacho, C., Chapman, R., Springate, E., et al. (2015). Phonon-Pump Extreme-Ultraviolet-Photoemission Probe in Graphene: Anomalous Heating of Dirac Carriers by Lattice Deformation. Physical Review Letters, 114(12): 125503. doi:10.1103/PhysRevLett.114.125503.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-B0BB-B Version Permalink: http://hdl.handle.net/21.11116/0000-0003-5D7A-D
Genre: Journal Article

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 Creators:
Gierz, Isabella1, Author              
Mitrano, Matteo2, Author              
Bromberger, Hubertus2, Author              
Cacho, Cephise3, Author
Chapman, Richard3, Author
Springate, Emma3, Author
Link, Stefan4, Author
Starke, Ulrich4, Author
Sachs, Burkhard5, Author
Eckstein, Martin6, Author              
Wehling, Tim O.7, Author
Katsnelson, Mikhail I.8, Author
Lichtenstein, Alexander5, Author
Cavalleri, Andrea2, 9, Author              
Affiliations:
1Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938295              
2Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
3Central Laser Facility, STFC Rutherford Appleton Laboratory, OX11 0QX Harwell, United Kingdom, ou_persistent22              
4Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany, ou_persistent22              
5I. Institut für Theoretische Physik, Universität Hamburg, 20355 Hamburg, Germany, ou_persistent22              
6Theory of Correlated Systems out of Equilibrium, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938296              
7Institut für Theoretische Physik, Universität Bremen, 28359 Bremen, Germany, ou_persistent22              
8Institute for Molecules and Materials, Radboud University Nijmegen, 6525 HP Nijmegen, Netherlands, ou_persistent22              
9Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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Free keywords: PACS numbers: 63.22.Rc, 73.22.Pr, 79.60.-i
 Abstract: We modulate the atomic structure of bilayer graphene by driving its lattice at resonance with the in-plane E1u lattice vibration at 6.3  μm. Using time- and angle-resolved photoemission spectroscopy (tr-ARPES) with extreme-ultraviolet (XUV) pulses, we measure the response of the Dirac electrons near the K point. We observe that lattice modulation causes anomalous carrier dynamics, with the Dirac electrons reaching lower peak temperatures and relaxing at faster rate compared to when the excitation is applied away from the phonon resonance or in monolayer samples. Frozen phonon calculations predict dramatic band structure changes when the E1u vibration is driven, which we use to explain the anomalous dynamics observed in the experiment.

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Language(s): eng - English
 Dates: 2014-11-142015-03-252015-03-27
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.114.125503
arXiv: 1411.3888
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 114 (12) Sequence Number: 125503 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1