Out-of-equilibrium dynamics of photoexcited spin-state concentration waves

Andrea Marino (1) , Marylise Buron-Le Cointe (1) , Maciej Lorenc (1) , Loic Toupet (1) , Robert Henning (2) , A. D. Dichiara (3) , Keith Moffat (2) , Nicolas Brefuel (4) , Eric Collet (1)

1 IPR - Institut de Physique de Rennes
2 CARS - Center for Advanced Radiation Sources [University of Chicago]
3 ANL - Argonne National Laboratory [Lemont]
4 OMNT - UMS 2920 - Observatoire des Micro et Nano Technologies

The spin crossover compound [FeIIH2L2-Me][PF6]2 presents a two-step phase transition. In the intermediate phase, a spin state concentration wave (SSCW) appears resulting from a symmetry breaking (cell doubling) associated with a long-range order of alternating high and low spin molecular states. By combining time-resolved optical and X-ray diffraction measurements on a single crystal, we study how such a system responds to femtosecond laser excitation and we follow in real time the erasing and rewriting of the SSCW

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Andrea Marino, Marylise Buron-Le Cointe, Maciej Lorenc, Loic Toupet, Robert Henning, et al.. Out-of-equilibrium dynamics of photoexcited spin-state concentration waves. Faraday Discussions, 2015, 177, pp.363-379. ⟨10.1039/C4FD00164H⟩. ⟨hal-01076615⟩