Activation of coherent lattice phonon following ultrafast molecular spin-state photo-switching: A molecule-to-lattice energy transfer
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- A. Marino
- Institute de Physique de Rennes 1 , UMR 6251 University Rennes 1-CNRS, 35042 Rennes, France
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- M. Cammarata
- Institute de Physique de Rennes 1 , UMR 6251 University Rennes 1-CNRS, 35042 Rennes, France
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- S. F. Matar
- Université de Bordeaux 2 CNRS, , ICMCB, 87 avenue du Dr. A. Schweitzer, Pessac 33608, France
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- J.-F. Létard
- Université de Bordeaux 2 CNRS, , ICMCB, 87 avenue du Dr. A. Schweitzer, Pessac 33608, France
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- G. Chastanet
- Université de Bordeaux 2 CNRS, , ICMCB, 87 avenue du Dr. A. Schweitzer, Pessac 33608, France
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- M. Chollet
- SLAC National Laboratory 3 LCLS, , Menlo Park, California 94025, USA
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- J. M. Glownia
- SLAC National Laboratory 3 LCLS, , Menlo Park, California 94025, USA
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- H. T. Lemke
- SLAC National Laboratory 3 LCLS, , Menlo Park, California 94025, USA
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- E. Collet
- Institute de Physique de Rennes 1 , UMR 6251 University Rennes 1-CNRS, 35042 Rennes, France
説明
<jats:p>We combine ultrafast optical spectroscopy with femtosecond X-ray absorption to study the photo-switching dynamics of the [Fe(PM-AzA)2(NCS)2] spin-crossover molecular solid. The light-induced excited spin-state trapping process switches the molecules from low spin to high spin (HS) states on the sub-picosecond timescale. The change of the electronic state (<50 fs) induces a structural reorganization of the molecule within 160 fs. This transformation is accompanied by coherent molecular vibrations in the HS potential and especially a rapidly damped Fe-ligand breathing mode. The time-resolved studies evidence a delayed activation of coherent optical phonons of the lattice surrounding the photoexcited molecules.</jats:p>
収録刊行物
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- Structural Dynamics
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Structural Dynamics 3 (2), 023605-, 2015-11-20
AIP Publishing
