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  Clocking the Melting Transition of Charge and Lattice Order in 1T−TaS2 with Ultrafast Extreme-Ultraviolet Angle-Resolved Photoemission Spectroscopy

Petersen, J. C., Kaiser, S., Dean, N., Simoncig, A., Liu, H., Cavalieri, A. L., et al. (2011). Clocking the Melting Transition of Charge and Lattice Order in 1T−TaS2 with Ultrafast Extreme-Ultraviolet Angle-Resolved Photoemission Spectroscopy. Physical Review Letters, 107(17): 177402. doi:10.1103/PhysRevLett.107.177402.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-15DB-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-30C5-F
Genre: Journal Article

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PhysRevLett.107.177402.pdf (Publisher version), 393KB
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PhysRevLett.107.177402.pdf
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2011
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© American Physical Society
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http://arxiv.org/abs/1010.5027 (Preprint)
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 Creators:
Petersen, Jesse C.1, 2, 3, Author              
Kaiser, Stefan1, 3, Author              
Dean, N.1, 3, Author
Simoncig, Alberto3, 4, Author              
Liu, Haiyun1, 3, Author              
Cavalieri, Adrian L.3, 4, Author              
Cacho, C.5, Author
Turcu, I. C. E.5, Author
Springate, E.5, Author
Frassetto, F.6, Author
Poletto, L.6, Author
Dhesi, S. S.7, Author
Berger, H.8, Author
Cavalleri, Andrea1, 2, 3, Author              
Affiliations:
1Condensed Matter Dynamics Division, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173637              
2Department of Physics, Oxford University, Clarendon Laboratory, Oxford, United Kingdom, ou_persistent22              
3Centre for Free Electron Laser Science, Hamburg, Germany, ou_persistent22              
4Extreme Timescales, Research Groups, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173639              
5Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell, United Kingdom, ou_persistent22              
6LUXOR, CNR-INFM, Padova, Italy, ou_persistent22              
7Diamond Light Source Ltd., Harwell, United Kingdom, ou_persistent22              
8Institute of Physics of Complex Matter, EPFL, Lausanne, Switzerland, ou_persistent22              

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Free keywords: PACS numbers: 78.47.jh, 79.60.-i
 Abstract: We use time- and angle-resolved photoemission spectroscopy with sub-30-fs extreme-ultraviolet pulses to map the time- and momentum-dependent electronic structure of photoexcited 1T−TaS2. This compound is a two-dimensional Mott insulator with charge-density wave ordering. Charge order, evidenced by splitting between occupied subbands at the Brillouin zone boundary, melts well before the lattice responds. This challenges the view of a charge-density wave caused by electron-phonon coupling and Fermi-surface nesting alone, and suggests that electronic correlations play a key role in driving charge order.

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Language(s): eng - English
 Dates: 2011-03-082011-10-182011-10-21
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.107.177402
arXiv: 1010.5027
 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: 107 (17) Sequence Number: 177402 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1