Simultaneous Structural and Electronic Transitions in Epitaxial VO2/TiO2(001)

Recent reports have identified new metaphases of VO2 with strain and/or doping, suggesting the structural phase transition and the metal-to-insulator transition might be decoupled. Using epitaxially strained VO2/TiO2 (001) thin films, which display a bulklike abrupt metal-to-insulator transition and...

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Bibliographic Details
Published in:Physical review letters 2020-05, Vol.124 (19)
Main Authors: Paez, Galo J, Singh, Christopher N, Wahila, Matthew J, Tirpak, Keith E, Quackenbush, Nicholas F, Sallis, Shawn, Paik, Hanjong, Liang, Yufeng, Schlom, Darrell G, Lee, Tien-Lin, Schlueter, Christoph, Lee, Wei-Cheng, Piper, Louis F J
Format: Article
Language:English
Subjects:
Phase transitions
Photoelectrons
Standing waves
Thin films
Titanium dioxide
Vanadium oxides
Citations: Items that cite this one
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Summary:Recent reports have identified new metaphases of VO2 with strain and/or doping, suggesting the structural phase transition and the metal-to-insulator transition might be decoupled. Using epitaxially strained VO2/TiO2 (001) thin films, which display a bulklike abrupt metal-to-insulator transition and rutile to monoclinic transition structural phase transition, we employ x-ray standing waves combined with hard x-ray photoelectron spectroscopy to simultaneously measure the structural and electronic transitions. This x-ray standing waves study elegantly demonstrates the structural and electronic transitions occur concurrently within experimental limits (±1  K).
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.124.196402