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Decoupling the lattice distortion and charge doping effects on the phase transition behavior of VO 2 by titanium (Ti 4+) doping
Wu Y.3; Fan L.2; Liu Q.2; Chen S.2; Huang W.2; Chen F.2; Liao G.2; Zou C.2; Wu Z.2
2015-05-07
Source PublicationScientific Reports
ISSN20452322
Volume5
AbstractThe mechanism for regulating the critical temperature (T C) of metal-insulator transition (MIT) in ions-doped VO 2 systems is still a matter of debate, in particular, the unclear roles of lattice distortion and charge doping effects. To rule out the charge doping effect on the regulation of T C, we investigated Ti 4+-doped VO 2 (Ti x V 1-x O 2) system. It was observed that the T C of Ti x V 1-x O 2 samples first slightly decreased and then increased with increasing Ti concentration. X-ray absorption fine structure (XAFS) spectroscopy was used to explore the electronic states and local lattice structures around both Ti and V atoms in Ti x V 1-x O 2 samples. Our results revealed the local structure evolution from the initial anatase to the rutile-like structure around the Ti dopants. Furthermore, the host monoclinic VO 2 lattice, specifically, the VO 6 octahedra would be subtly distorted by Ti doping. The distortion of VO 6 octahedra and the variation of T C showed almost the similar trend, confirming the direct effect of local structural perturbations on the phase transition behavior. By comparing other ion-doping systems, we point out that the charge doping is more effective than the lattice distortion in modulating the MIT behavior of VO 2 materials.
DOI10.1038/srep09328
URLView the original
Language英語
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Cited Times [WOS]:33   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Institute of High Energy Physics Chinese Academy of Science
2.University of Science and Technology of China
3.Peking University
Recommended Citation
GB/T 7714
Wu Y.,Fan L.,Liu Q.,et al. Decoupling the lattice distortion and charge doping effects on the phase transition behavior of VO 2 by titanium (Ti 4+) doping[J]. Scientific Reports,2015,5.
APA Wu Y..,Fan L..,Liu Q..,Chen S..,Huang W..,...&Wu Z..(2015).Decoupling the lattice distortion and charge doping effects on the phase transition behavior of VO 2 by titanium (Ti 4+) doping.Scientific Reports,5.
MLA Wu Y.,et al."Decoupling the lattice distortion and charge doping effects on the phase transition behavior of VO 2 by titanium (Ti 4+) doping".Scientific Reports 5(2015).
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