Time-resolved imaging and spectroscopy for the photo-induced phase transition in Ti4O7

Autor:	Yudai Suzuki, Hayato Kamioka, Hiroyuki Tsukada, Ryo-taro Yamaguchi, Takeru Tateno, Yuki Fukui
Rok vydání:	2015
Předmět:	Phase transition Chemistry General Chemical Engineering Analytical chemistry General Physics and Astronomy General Chemistry Dielectric Titanium oxide chemistry.chemical_compound Reflection (mathematics) Phase (matter) Excited state Titanium dioxide Spectroscopy
Zdroj:	Journal of Photochemistry and Photobiology A: Chemistry. 311:154-159
ISSN:	1010-6030
DOI:	10.1016/j.jphotochem.2015.06.027
Popis:	Time-resolved reflection imaging and spectroscopy were performed for single crystals of reduced-type titanium oxide Ti 4 O 7 . This shows two-step phase transition at 140 K from the low temperature (LT) phase to the intermediate (IT) phase and at 160 K from the IT phase to the high temperature (HT) phase. After the photo-irradiation in the IT phase, the time profiles of the reflection spectra and the excited area images showed spontaneous domain growth of the photo-induced HT phase. Analysis of the reflection images with the dielectric functions derived the growth velocity of the induced HT state. The value is close to that of the acoustic phonon in the core titanium dioxide.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8321837be8b30d15aa62bfbef4989205 https://doi.org/10.1016/j.jphotochem.2015.06.027 Zobrazit plný text záznamu Full Text from ScienceDirect