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  Optically excited structural transition in atomic wires on surfaces at the quantum limit

Frigge, T., Hafke, B., Witte, T., Krenzer, B., Streubühr, C., Syed, A. S., et al. (2017). Optically excited structural transition in atomic wires on surfaces at the quantum limit. Nature, 544(7649), 207-211. doi:10.1038/nature21432.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C68D-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C715-9
Genre: Journal Article

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 Creators:
Frigge, Tim1, Author              
Hafke, B.2, Author              
Witte, T.2, Author              
Krenzer, Boris1, Author              
Streubühr, Carla2, Author              
Syed, A. Samad2, Author              
Trontl, Vesna Mikšić2, Author              
Avigo, Isabella2, Author              
Zhou, P.2, Author              
Ligges, Manuel2, Author              
von der Linde, Dietrich D.2, Author              
Bovensiepen, Uwe2, Author              
Horn-von Hoegen, M.3, Author              
Wippermann, Stefan Martin4, Author              
Lücke, Andreas5, Author              
Gerstmann, Uwe6, Author              
Schmidt, W. G.6, Author              
Affiliations:
1Department of Physics, Center for Nanointegration (CENIDE), University of Duisburg-Essen, Lotharstraße 1, 47048 Duisburg, Germany, ou_persistent22              
2Fakultät für Physik und Center for Nanointegration (CENIDE), Universität Duisburg-Essen, Lotharstrasse 1, Duisburg, Germany, persistent22              
3Department of Physics, Center for Nanointegration (CENIDE), University of Duisburg-Essen, Lotharstraße 1, 47048 Duisburg, Germany , ou_persistent22              
4Atomistic Modelling, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863350              
5Lehrstuhl für Theoretische Physik, Universität Paderborn, Paderborn, Germany, ou_persistent22              
6Lehrstuhl für Theoretische Physik, Universität Paderborn, 33095 Paderborn, Germany, ou_persistent22              

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Free keywords: CHARGE-DENSITY-WAVE; ULTRAFAST ELECTRON CRYSTALLOGRAPHY; DIFFRACTION; PHASE; MOTIONS;
 Abstract: Transient control over the atomic potential-energy landscapes of solids could lead to new states of matter and to quantum control of nuclear motion on the timescale of lattice vibrations. Recently developed ultrafast time-resolved diffraction techniques(1) combine ultrafast temporal manipulation with atomic-scale spatial resolution and femtosecond temporal resolution. These advances have enabled investigations of photo-induced structural changes in bulk solids that often occur on timescales as short as a few hundred femtoseconds(2-6). In contrast, experiments at surfaces and on single atomic layers such as graphene report timescales of structural changes that are orders of magnitude longer(7-9). This raises the question of whether the structural response of low-dimensional materials to femtosecond laser excitation is, in general, limited. Here we show that a photo-induced transition from the low-to high-symmetry state of a charge density wave in atomic indium (In) wires supported by a silicon (Si) surface takes place within 350 femtoseconds. The optical excitation breaks and creates In-In bonds, leading to the non-thermal excitation of soft phonon modes, and drives the structural transition in the limit of critically damped nuclear motion through coupling of these soft phonon modes to a manifold of surface and interface phonons that arise from the symmetry breaking at the silicon surface. This finding demonstrates that carefully tuned electronic excitations can create non-equilibrium potential energy surfaces that drive structural dynamics at interfaces in the quantum limit (that is, in a regime in which the nuclear motion is directed and deterministic)(8). This technique could potentially be used to tune the dynamic response of a solid to optical excitation, and has widespread potential application, for example in ultrafast detectors(10,11).

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Language(s): eng - English
 Dates: 2017-04-13
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: ISI: 000398897900032
DOI: 10.1038/nature21432
 Degree: -

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Title: Nature
  Abbreviation : Nature
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 544 (7649) Sequence Number: - Start / End Page: 207 - 211 Identifier: ISSN: 0028-0836
CoNE: /journals/resource/954925427238