| Autor: |
Kubli, Martin, Savoini, Matteo, Abreu, Elsa, Burganov, Bulat, Lantz, Gabriel, Huber, Lucas, Neugebauer, Martin J., Boie, Larissa, Esposito, Vincent, Bothschafter, Elisabeth M., Parchenko, Sergii, Grübel, Sebastian, Porer, Michael, Rittmann, Jochen, Beaud, Paul, Staub, Urs, Yabashi, Makina, Tanaka, Yoshikazu, Katayama, Tetsuo, Togashi, Tadashi |
| Předmět: |
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| Zdroj: |
Applied Sciences (2076-3417); Feb2019, Vol. 9 Issue 3, p525, 11p |
| Abstrakt: |
We investigate the structural dynamics of the incommensurately modulated phase of Sn 2 P 2 Se 6 by means of time-resolved X-ray diffraction following excitation by an optical pump. Tracking the incommensurable distortion in the time domain enables us to identify the transport effects leading to a complete disappearance of the incommensurate phase over the course of 100 ns. These observations suggest that a thin surface layer of the high-temperature phase forms quickly after photo-excitation and then propagates into the material with a constant velocity of 3.7 m/s. Complementary static structural measurements reveal previously unreported higher-order satellite reflection in the incommensurate phase. These higher-order reflections are attributed to cubic vibrational terms in the Hamiltonian. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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