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  Photo-molecular high temperature superconductivity

Buzzi, M., Nicoletti, D., Fechner, M., Tancogne-Dejean, N., Sentef, M. A., Georges, A., et al. (2020). Photo-molecular high temperature superconductivity.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-7C9F-E Version Permalink: http://hdl.handle.net/21.11116/0000-0005-7CA0-B
Genre: Paper

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2001.05389.pdf (Preprint), 5MB
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2001.05389.pdf
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2020
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https://arxiv.org/abs/2001.05389 (Preprint)
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 Creators:
Buzzi, M.1, Author              
Nicoletti, D.1, Author              
Fechner, M.1, Author              
Tancogne-Dejean, N.2, Author              
Sentef, M. A.3, Author              
Georges, A.4, 5, Author
Dressel, M.6, Author
Henderson, A.7, Author
Siegrist, T.7, Author
Schlueter, J. A.7, 8, Author
Miyagawa, K.9, Author
Kanoda, K.9, Author
Nam, M.-S.10, Author
Ardavan, A.10, Author
Coulthard, J.10, Author
Tindall, J.10, Author
Schlawin, F.10, Author
Jaksch, D.10, Author
Cavalleri, A.1, 10, Author              
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
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              
4Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              
5Collège de France, ou_persistent22              
61. Physikalisches Institut, Universität Stuttgart, ou_persistent22              
7National High Magnetic Field Laboratory, ou_persistent22              
8Division of Material Research, National Science Foundation, ou_persistent22              
9Department of Applied Physics, University of Tokyo, ou_persistent22              
10Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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 Abstract: Superconductivity in organic conductors is often tuned by the application of chemical or external pressure. With this type of tuning, orbital overlaps and electronic bandwidths are manipulated, whilst the properties of the molecular building blocks remain virtually unperturbed.Here, we show that the excitation of local molecular vibrations in the charge-transfer salt κ−(BEDT−TTF)2Cu[N(CN)2]Br induces a colossal increase in carrier mobility and the opening of a superconducting-like optical gap. Both features track the density of quasi-particles of the equilibrium metal, and can be achieved up to a characteristic coherence temperature T∗≊50K, far higher than the equilibrium transition temperature TC=12.5K. Notably, the large optical gap achieved by photo-excitation is not observed in the equilibrium superconductor, pointing to a light induced state that is different from that obtained by cooling. First-principle calculations and model Hamiltonian dynamics predict a transient state with long-range pairing correlations, providing a possible physical scenario for photo-molecular superconductivity.

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Language(s): eng - English
 Dates: 2020-01-15
 Publication Status: Published online
 Pages: 37
 Publishing info: -
 Table of Contents: -
 Rev. Method: No review
 Identifiers: arXiv: 2001.05389
 Degree: -

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