Charge correlations and their photoinduced dynamics in charge-ordered organic ferroelectrics
| Autor: | Hirotake Itoh, Hirokazu Obatake, Rina Fujiwara, Yohei Kawakami, Kaoru Yamamoto, Martin Dressel, Shinichiro Iwai |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical Review Research, Vol 3, Iss 3, p L032043 (2021) |
| Druh dokumentu: | article |
| ISSN: | 2643-1564 11884606 |
| DOI: | 10.1103/PhysRevResearch.3.L032043 |
| Popis: | By employing THz absorption and emission spectroscopy we were able to disentangle long-range charge order with a hundreds micrometer scale and short-range charge fluctuations that occur well above the charge-order phase transition in quasi-one-dimensional organic ferroelectrics, (TMTTF)_{2}X (X=AsF_{6}, PF_{6}, and SbF_{6}). While long-range charge order melts by photoexcitation irrespective of temperature or chemical pressure, short-range fluctuations are actually enhanced close to the charge-order phase boundary for X=AsF_{6} and PF_{6}. Our findings reveal that short-range fluctuations show various photoresponses depending on both temperature and electronic parameters, providing a design strategy for nonequilibrium states. |
| Databáze: | Directory of Open Access Journals |
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