Photoinduced dynamics of Ti2O3

被引：0
|
作者：
Akimoto, Kaoru [1 ]
Ikeda, Kai [1 ]
Yoshida, Taishi [1 ]
Takasu, Kazuya [2 ]
Izaki, Tetsuro [2 ]
Okuda, Tetsuji [2 ]
Katsufuji, Takuro [1 ,3 ]
机构：
[1] Waseda Univ, Dept Phys, Tokyo 1698555, Japan
[2] Kagoshima Univ, Grad Sch Sci & Engn, Kagoshima 8900065, Japan
[3] Waseda Univ, Kagami Mem Res Inst Mat Sci & Technol, Tokyo 1690051, Japan
来源：
PHYSICAL REVIEW B | 2024年 / 110卷 / 15期
关键词：
METAL-INSULATOR-TRANSITION; PHASE-TRANSITION; FEMTOSECOND; VO2;
D O I：
10.1103/PhysRevB.110.155158
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The photoinduced dynamics of Ti2O3 with a corundum structure have been investigated by pump-probe optical spectroscopy. It is found that a peak in the optical spectrum corresponding to excitations within Ti-Ti dimers is suppressed when a laser pulse is applied at room temperature, indicating a photoinduced phase transition from the low-temperature insulating state to the high-temperature conducting state in Ti2O3. In addition, the oscillation of reflectivity with time is observed, which can be explained by a strain wave generated by a laser pulse applied to the sample surface. The dependence of the oscillation on the direction of the surface indicates that the change in the c lattice constant parallel to the Ti-Ti dimers plays an important role in the phase transition.
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页数：8
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