Heterogeneous nucleation and growth dynamics in the light-induced phase transition in vanadium dioxide

被引:16
|
作者
Brady, Nathaniel F. [1 ]
Appavoo, Kannatassen [2 ]
Seo, Minah [3 ,4 ]
Nag, Joyeeta [2 ]
Prasankumar, Rohit P. [4 ]
Haglund, Richard F., Jr. [2 ]
Hilton, David J. [1 ]
机构
[1] Univ Alabama Birmingham, Dept Phys, Birmingham, AL 35294 USA
[2] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA
[3] Korea Inst Sci & Technol, Seoul 136791, South Korea
[4] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA
基金
美国国家科学基金会;
关键词
insulator-to-metal phase transitions; heterogeneous phase transitions; light-induced phase transitions; METAL-INSULATOR-TRANSITION; VO2; KINETICS;
D O I
10.1088/0953-8984/28/12/125603
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We report on ultrafast optical investigations of the light-induced insulator-to-metal phase transition in vanadium dioxide with controlled disorder generated by substrate mismatch. These results reveal common dynamics of this optically-induced phase transition that are independent of this disorder. Above the fluence threshold for completing the transition to the rutile crystalline phase, we find a common time scale, independent of sample morphology, of 40.5 +/- 2 ps that is consistent with nucleation and growth dynamics of the R phase from the parent M1 ground state.
引用
收藏
页数:7
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