Time-Resolved Coherent Diffraction of Ultrafast Structural Dynamics in a Single Nanowire

作者：Mary Newton, Mayu Sao, Yuta Fujisawa, Rena Onitsuka, Tomoya Kawaguchi, Kazuya Tokuda, Takahiro Sato, Tadashi Togashi, Makina Yabashi, Tetsuya Ishikawa, Tetsu Ichitsubo, Eiichiro Matsubara, Yoshihito Tanaka, Yoshinori Nishino · 发表于：Nano Letters · 年份：2014 · DOI：10.1021/nl500072d · 被引用次数：22 · 研究领域：Advanced Electron Microscopy Techniques and Applications、Advanced X-ray Imaging Techniques、Transition Metal Oxide Nanomaterials

The continuing effort to utilize the unique properties present in a number of strongly correlated transition metal oxides for novel device applications has led to intense study of their transitional phase state behavior. Here we report on time-resolved coherent X-ray diffraction measurements on a single vanadium dioxide nanocrystal undergoing a solid-solid phase transition, using the SACLA X-ray Free Electron Laser (XFEL) facility. We observe an ultrafast transition from monoclinic to tetragonal crystal structure in a single vanadium dioxide nanocrystal. Our findings demonstrate that the structural change occurs in a number of distinct stages attributed to differing expansion modes of vanadium atom pairs.