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.

引用

页数：8

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