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

下志万 貴博; 中村 飛鳥; 石坂 香子; 田中 良和; 田久保 耕; 平田 靖透; 和達 大樹; 山本 達; 松田 巌; 池浦 晃至; 高橋 英史; 酒井 英明; 石渡 晋太郎; 富樫 格; 大和田 成起; 片山 哲夫; 登野 健介; 矢橋 牧名; 辛 埴

doi:10.57415/xshinpo.49.0_163

Original Papers

Lattice Dynamics of 1T′-MoTe₂ Studied by Time-Resolved Transmission X-Ray Diffraction at SACLA

Takahiro SHIMOJIMA, Asuka NAKAMURA, Kyoko ISHIZAKA, Yoshikazu TANAKA, Kou TAKUBO, Yasuyuki HIRATA, Hiroki WADATI, Susumu YAMAMOTO, Iwao MATSUDA, Koji IKEURA, Hidefumi TAKAHASHI, Hideaki SAKAI, Shintaro ISHIWATA, Tadashi TOGASHI, Shigeki OWADA, Tetsuo KATAYAMA, Kensuke TONO, Makina YABASHI, Shik SHIN

Author information

Takahiro SHIMOJIMA
RIKEN Center for Emergent Matter Science (CEMS)
Asuka NAKAMURA
Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo
Kyoko ISHIZAKA
RIKEN Center for Emergent Matter Science (CEMS)
Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo
Yoshikazu TANAKA
RIKEN SPring-8 Center
Kou TAKUBO
Institute for Solid State Physics (ISSP), The University of Tokyo
Yasuyuki HIRATA
Institute for Solid State Physics (ISSP), The University of Tokyo
Hiroki WADATI
Institute for Solid State Physics (ISSP), The University of Tokyo
Susumu YAMAMOTO
Institute for Solid State Physics (ISSP), The University of Tokyo
Iwao MATSUDA
Institute for Solid State Physics (ISSP), The University of Tokyo
Koji IKEURA
Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo
Hidefumi TAKAHASHI
Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo
Hideaki SAKAI
Department of Physics, Osaka University
Shintaro ISHIWATA
Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo
Tadashi TOGASHI
RIKEN SPring-8 Center
Japan Synchrotron Radiation Research Institute
Shigeki OWADA
RIKEN SPring-8 Center
Tetsuo KATAYAMA
RIKEN SPring-8 Center
Japan Synchrotron Radiation Research Institute
Kensuke TONO
RIKEN SPring-8 Center
Japan Synchrotron Radiation Research Institute
Makina YABASHI
RIKEN SPring-8 Center
Japan Synchrotron Radiation Research Institute
Shik SHIN
Institute for Solid State Physics (ISSP), The University of Tokyo

Keywords: Time-resolved X-ray diffraction, X-ray free electron laser, Transition metal dichalcogenides

JOURNAL FREE ACCESS

2018 Volume 49 Pages 163-168

DOI https://doi.org/10.57415/xshinpo.49.0_163

Details

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.

Corresponding author

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