期刊
PHYSICAL REVIEW B
卷 86, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.134101
关键词
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资金
- Max Planck Society
- Office of Science, US Department of Energy [DE-FG02-01ER45916]
- Grants-in-Aid for Scientific Research [23246012] Funding Source: KAKEN
We report on a general mechanism for photo-induced phase transitions. The process relies on the photo-injection of hot electrons from an adjacent metallic layer to trigger the structural dynamics of the materials of interest. This mechanism is demonstrated for the semiconductor-to-metal phase transition of VO2 using a 20 nm Au injection layer. The nature of the phase transition is demonstrated by time-resolved optical transmission measurements, as well as a well defined bias dependence that illustrates that the Au film is the source of nonequilibrium electrons driving the phase transition.
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