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  Charge density wave melting in one-dimensional wires with femtosecond sub-gap excitation

Chavez Cervantes, M., Topp, G., Aeschlimann, S., Krause, R., Sato, S., Sentef, M. A., et al. (2018). Charge density wave melting in one-dimensional wires with femtosecond sub-gap excitation.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-6514-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-A4D6-3
Genre: Paper

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1810.09731.pdf (Preprint), 4MB
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https://arxiv.org/abs/1810.09731 (Preprint)
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 Creators:
Chavez Cervantes, M.1, 2, Author              
Topp, G.2, 3, Author              
Aeschlimann, S.1, 2, Author              
Krause, R.1, 2, Author              
Sato, S.2, 4, Author              
Sentef, M. A.2, 3, Author              
Gierz, I.1, 2, Author              
Affiliations:
1Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938295              
2Center for Free Electron Laser Science, Hamburg, ou_persistent22              
3Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              

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 Abstract: Charge density waves (CDWs) are symmetry-broken ground states that commonly occur in low-dimensional metals due to strong electron-electron and/or electron-phonon coupling. The non-equilibrium carrier distribution established via photodoping with femtosecond laser pulses readily quenches these ground states and induces an ultrafast insulator-to-metal phase transition. To date, CDW melting has been mainly investigated in the single-photon and tunneling regimes, while the intermediate multi-photon regime has received little attention. Here we excite one-dimensional indium wires with a CDW gap of ~300meV with mid-infrared pulses at 190meV with MV/cm field strength and probe the transient electronic structure with time- and angle-resolved photoemission spectroscopy (tr-ARPES). We find that the CDW gap is filled on a timescale short compared to our temporal resolution of 300fs and that the phase transition is completed within ~1ps. Supported by a minimal theoretical model we attribute our findings to multi-photon absorption across the CDW gap.

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Language(s): eng - English
 Dates: 2018-10-232018-10-23
 Publication Status: Published online
 Pages: 17
 Publishing info: -
 Table of Contents: -
 Rev. Method: No review
 Identifiers: arXiv: 1810.09731
 Degree: -

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