Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition -: art. no. 237401

被引:1074
作者
Cavalleri, A [1 ]
Tóth, C
Siders, CW
Squier, JA
Ráksi, F
Forget, P
Kieffer, JC
机构
[1] Univ Calif San Diego, La Jolla, CA 92093 USA
[2] Opt X Inc, Lake Forest, CA 92630 USA
[3] Univ Quebec, INRS Energie & Mat, Varennes, PQ, Canada
关键词
D O I
10.1103/PhysRevLett.87.237401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Femtosecond x-ray and visible pulses were used to probe structural and electronic dynamics during an optically driven, solid-solid phase transition in VO2. For high interband electronic excitation (similar to5 x 10(21) cm(-3)), a subpicosecond transformation into the high-T, rutile phase of the material is observed, simultaneous with an insulator-to-metal transition. The fast time scale observed suggests that, in this regime, the structural transition may not be thermally initiated.
引用
收藏
页码:237401 / 1
页数:4
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