학술논문
Lattice Dynamics of 1T′-MoTe2 Studied by Time-Resolved Transmission X-Ray Diffraction at SACLA / SACLAを用いた時間分解透過型X線回折による1T′-MoTe2の格子ダイナミクス観測
Document Type
Journal Article
Author
Asuka NAKAMURA; Hideaki SAKAI; Hidefumi TAKAHASHI; Hiroki WADATI; Iwao MATSUDA; Kensuke TONO; Koji IKEURA; Kou TAKUBO; Kyoko ISHIZAKA; Makina YABASHI; Shigeki OWADA; Shik SHIN; Shintaro ISHIWATA; Susumu YAMAMOTO; Tadashi TOGASHI; Takahiro SHIMOJIMA; Tetsuo KATAYAMA; Yasuyuki HIRATA; Yoshikazu TANAKA; 下志万 貴博; 中村 飛鳥; 和達 大樹; 大和田 成起; 富樫 格; 山本 達; 平田 靖透; 松田 巌; 池浦 晃至; 片山 哲夫; 田中 良和; 田久保 耕; 登野 健介; 矢橋 牧名; 石坂 香子; 石渡 晋太郎; 辛 埴; 酒井 英明; 高橋 英史
Source
Ｘ線分析の進歩 / Advances in X-Ray Chemical Analysis, Japan. 2018, 49:163
Subject
Language
Japanese
ISSN
0911-7806
2758-3651
2758-3651
Abstract
We studied the ultrafast structural dynamics of 1T'-MoTe2 by the time-resolved hard X-ray diffraction at SACLA. The bulk single crystals were cut into the thin flakes with thickness of 50 nm and used to observe the Bragg spots in a transmission geometry. The 200 and 020 Bragg peaks showed different evolution in thier intensity after the photoexcitation. The unusual lattice dynamics over 10 ps for 200 peak suggests the photoinduced modification of the one-dimensional structural chains. The present results might indicate the presence of the metastable state in 1T'-MoTe2 which is not achieved in the thermal equirilibrium state.