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.; Gierz, I.

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

MPS-Authors

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Chavez Cervantes, M.
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science, Hamburg;

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Topp, G.
Center for Free Electron Laser Science, Hamburg;
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

/persons/resource/persons180731

Aeschlimann, S.
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science, Hamburg;

/persons/resource/persons202145

Krause, R.
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science, Hamburg;

/persons/resource/persons222317

Sato, S.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science, Hamburg;

/persons/resource/persons182604

Sentef, M. A.
Center for Free Electron Laser Science, Hamburg;
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

/persons/resource/persons133795

Gierz, I.
Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science, Hamburg;

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https://arxiv.org/abs/1810.09731
(Preprint)

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1810.09731.pdf
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Citation

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.

Cite as: https://hdl.handle.net/21.11116/0000-0002-6514-6

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.