Understanding the Phase Transition Evolution Mechanism of Partially M2 Phased VO2 Film by Hydrogen Incorporation
| Autor: | Sehwan Song, Jiwoong Kim, Taewon Min, Dooyong Lee, Gongin Lee, Sungkyun Park, Jisung Lee, Jong-Seong Bae, Jaekwang Lee, Haeyong Kang |
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| Rok vydání: | 2020 |
| Předmět: |
Diffraction
Phase transition Materials science Hydrogen chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Mott transition Metal chemistry Chemical physics Rutile visual_art Phase (matter) visual_art.visual_art_medium General Materials Science Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy |
| Zdroj: | The Journal of Physical Chemistry Letters. 11:9680-9688 |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/acs.jpclett.0c02592 |
| Popis: | Studies on the hydrogen incorporated M1 phase of VO2 film have been widely reported. However, there are few works on an M2 phase of VO2. Recently, the M2 phase in VO2 has received considerable attention due to the possibility of realizing a Mott transition field-effect transistor. By varying the postannealing environment, systematic variations of the M2 phase in (020)-oriented VO2 films grown on Al2O3(0001) were observed. The M2 phase converted to the metallic M1 phase at first and then to the metallic rutile phase after hydrogen annealing (i.e., for H2/N2 mixture and H2 environments). From the diffraction and spectroscopy measurements, the transition is attributed to suppressed electron interactions, not structural modification caused by hydrogen incorporation. Our results suggest the understanding of the phase transition process of the M2 phase by hydrogen incorporation and the possibility of realization of the M2 phased-based Mott transition field-effect transistor. |
| Databáze: | OpenAIRE |
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