Reversible switching between pressure-induced amorphization and thermal-driven recrystallization in VO2(B) nanosheets

Yonggang Wang (), Jinlong Zhu, Wenge Yang (), Ting Wen, Michael Pravica, Zhenxian Liu, Mingqiang Hou, Yingwei Fei, Lei Kang, Zheshuai Lin, Changqing Jin and Yusheng Zhao ()
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Yonggang Wang: High Pressure Science and Engineering Center, University of Nevada
Jinlong Zhu: High Pressure Science and Engineering Center, University of Nevada
Wenge Yang: HPSynC, Geophysical Laboratory, Carnegie Institution of Washington
Ting Wen: Institute of Nanostructured Functional Materials, Huanghe Science and Technology College
Michael Pravica: High Pressure Science and Engineering Center, University of Nevada
Zhenxian Liu: Geophysical Laboratory, Carnegie Institution of Washington
Mingqiang Hou: Geophysical Laboratory, Carnegie Institution of Washington
Yingwei Fei: Geophysical Laboratory, Carnegie Institution of Washington
Lei Kang: Beijing Centre for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
Zheshuai Lin: Beijing Centre for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
Changqing Jin: National Laboratory for Condensed Matter Physics, Institute of Physics, CAS
Yusheng Zhao: High Pressure Science and Engineering Center, University of Nevada

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Pressure-induced amorphization (PIA) and thermal-driven recrystallization have been observed in many crystalline materials. However, controllable switching between PIA and a metastable phase has not been described yet, due to the challenge to establish feasible switching methods to control the pressure and temperature precisely. Here, we demonstrate a reversible switching between PIA and thermally-driven recrystallization of VO2(B) nanosheets. Comprehensive in situ experiments are performed to establish the precise conditions of the reversible phase transformations, which are normally hindered but occur with stimuli beyond the energy barrier. Spectral evidence and theoretical calculations reveal the pressure–structure relationship and the role of flexible VOx polyhedra in the structural switching process. Anomalous resistivity evolution and the participation of spin in the reversible phase transition are observed for the first time. Our findings have significant implications for the design of phase switching devices and the exploration of hidden amorphous materials.

Date: 2016
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DOI: 10.1038/ncomms12214

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