Three-dimensional atomic images of TlInSe thermoelectric material obtained by X-ray fluorescence holography

蛍光X線ホログラフィによる熱電材料TlInSeの三次元原子像

細川 伸也*; 八方 直久*; 林 好一*; 三村 功次郎*; 脇田 和樹*; Hu, W.; 石井 啓文*; 吉村 政人*; Jeyakanthan, J.*; Mamedov, N.*

Hosokawa, Shinya*; Happo, Naohisa*; Hayashi, Koichi*; Mimura, Kojiro*; Wakita, Kazuki*; Hu, W.; Ishii, Hirofumi*; Yoshimura, Masato*; Jeyakanthan, J.*; Mamedov, N.*

Three dimensional (3D) atomic images around the Tl atoms in single crystal TlInSe thermoelectric material in the incommensurate phase were reconstructed by using Tl X-ray fluorescence holography measured at room temperature. In the obtained 3D image, the In atoms are clearly visible at the proper positions in the normal phase. However, the Tl atomic images are also observed but very weak. By comparing the experimental image with a theoretically calculated one, it is concluded that only the Tl atoms have large spatial fluctuations, which are related to the incommensurate phase of this material.