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- W2621870587 abstract "A series of Ti x V1-x O2 (0% ⩽ x ⩽ 4.48%) thin films on c-plane sapphire substrates have been fabricated by co-sputtering oxidation solutions, and the metal-insulator transition temperature (T MIT) of Ti x V1-x O2 films rises monotonically at the rate of 1.64 K/at.% Ti. The x-ray diffraction measurement results show that, after Ti4+ ion doping, the rutile structure expands along the c r axis while shrinking along the a r and b r axis simultaneously. It makes the V-O bond length shorter, which is believed to upshift the π * orbitals. The rising of π * orbitals in Ti-doped VO2 has been illustrated by ultraviolet-infrared spectroscopy and first-principles calculation. With the Ti4+ ion doping concentration increasing, the energy levels of π * orbitals are elevated and the electronic occupation of π * orbitals decreases, which weakens the shielding for the strong electron-electron correlations in the d|| orbital and result in the T MIT rising. The research reveals that the T MIT of VO2 can be effected by the electronic occupancy of π * orbitals in a rutile state, which is helpful for developing VO2-based thermal devices." @default.
- W2621870587 created "2017-06-15" @default.
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- W2621870587 date "2017-07-31" @default.
- W2621870587 modified "2023-09-26" @default.
- W2621870587 title "Orbital electronic occupation effect on metal–insulator transition in Ti<sub> <i>x</i> </sub>V<sub>1−<i>x</i> </sub>O<sub>2</sub>" @default.
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- W2621870587 doi "https://doi.org/10.1088/1361-648x/aa7707" @default.
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