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Pressure-induced metallization and amorphization in VO2(A) nanorods
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2016 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 93, no 18, 184109Article in journal (Refereed) Published
Abstract [en]

A metallic state enabled by the metal-insulator transition (MIT) in single crystal VO2(A) nanorods is demonstrated, which provides important physical foundation in experimental understanding of MIT in VO2. The observed tetragonal metallic state at ∼28 GPa should be interpreted as a distinct metastable state, while increasing pressure to ∼32 GPa, it transforms into a metallic amorphous state completely. The metallization is due to V 3d orbital electrons delocalization, and the amorphization is attributed to the unique variation of V-O-V bond angle. A metallic amorphous VO2 state is found under pressure, which is beneficial to explore the phase diagram of VO2. Furthermore, this work proves the occurrence of both the metallization and amorphization in octahedrally coordinated materials.

Place, publisher, year, edition, pages
2016. Vol. 93, no 18, 184109
Keyword [en]
Amorphization, vanadium dioxide, high pressure, metal-insulator transition, Raman spectroscopy, X-ray diffraction
National Category
Condensed Matter Physics
Research subject
Solid State Physics
Identifiers
URN: urn:nbn:se:umu:diva-121830DOI: 10.1103/PhysRevB.93.184109ISI: 000376636100001OAI: oai:DiVA.org:umu-121830DiVA: diva2:934538
Available from: 2016-06-09 Created: 2016-06-09 Last updated: 2016-12-08Bibliographically approved

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Sundqvist, Bertil
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf