講演情報
[25a-32A-3]Dynamics of lattice structure leading to the photo-induced phase transition in VO2 thin film
〇(D)Le ThiMy Nguyen1, Shunsuke Nozawa1,2, Daisuke Okuyama1,2, Hironori Nakao1,2, Keisuke Shibuya3, Shinichi Adachi1,4, Ryo Fukaya2 (1.SOKENDAI Univ., 2.KEK-IMSS, 3.AIST, 4.KEK)
キーワード：
photo-induced phase transition、vanadium dioxide、electronic devices
Here, we are promoting the time-resolved X-ray diffraction experiments for a VO2(80nm)/TiO2(001) thin film [1,2] to extract the electron-lattice correlations of the phase transition, which is based on the different dynamic of the (0 0 2) Bragg peak (lattice structure) and the (0 -1/2 3/2) superlattice peak (V dimerization) (around TC∼300K). Specifically, after a series of experiments we have successfully observed transient photoinduced phase transition signals from M1 to R phase which is clearly separated from the thermal heating components