Atomic-Scale Observation of Monoclinic Nanodomain in VO2 with Ultra-Fast and Energy Efficient Metal-Insulator Transition

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Heterogeneous integration of single-crystal rutile TiO2 film on silicon substrate

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Atomic-scale investigation of unique polar-state in free-standing single-crystal PZT nanotubes

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Reversible control of in-gap states f『om surface oxygen vacancies in perovskite stannates with ultraviolet light

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Theinfluenceofdomainboundariesandcrystallographicorientationsontheexsolutionof Ni-Snnanoparticlesinaperovskitestannate

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The influence of domain boundaries and crystallographic orientations on the exsolution of Ni-Sn nanoparticles in a perovskite stannate

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Piezo strain-controlled phase transition in single-crystalline Mott switches for threshold-manipulated leaky integrate-and-fire neurons

Electrical manipulation of the metal-insulator transition (MIT) in quantum materials has attracted considerable attention toward the development of ultracompact neuromorphic devices because of their stimuli-triggered transformations. VO2 is expected to undergo abrupt electronic phase transition by piezo strain near room temperature; however, the unrestricted integration of defect-free VO2 films on piezoelectric substrates is required to fully exploit this emerging phenomenon in oxide heterostructures. Here, we demonstrate the integration of single-crystalline VO2 films on highly lattice-mismatched PMN-PT piezoelectric substrates using a single-crystal TiO2-nanomembrane (NM) template. Using our strategy on heterogeneous integration, single-crystal-like steep transition was observed in the defect-free VO2 films on TiO2-NM-PMN-PT. Unprecedented T-MI modulation (5.2 kelvin) and isothermal resistance of VO2 [Delta R/R (E-g) approximate to 18,000% at 315 kelvin] were achieved by the efficient strain transfer-induced MIT, which cannot be achieved using directly grown VO2/PMN-PT substrates. Our results provide a fundamental strategy to realize a single-crystalline artificial heterojunction for promoting the application of artificial neurons using emergent materials.Y

Visualization of the crystallographic effect of oxygen diffusion channels in VO2

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Visualization of the crystallographic effect on oxygen diffusion in VO2

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Understanding the Physical Origin of Anisotropic Oxygen Diffusion Process during TiO2 Epitaxy on VO2 Surface through First-Principles Calculations

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