An Interesting Functional Phase Change Material VO₂: Response to Multivariate Control and Extensive Applications in Optics and Electronics

Abstract

Under physical conditions such as TC = 68 °C, Vanadium dioxide (VO2) undergoes a reversible transformation from a monoclinic phase to a tetragonal rutile phase. This transformation is accompanied by a series of changes in physical properties, including transmittance, conductivity, and refractive index, which make it an excellent functional material. Based on this, VO2 has been extensively researched and applied in the fields of electronics and optics, yielding remarkable results and making it a hot research material. This paper reviews the phase transition mechanisms and optical/electrical properties of VO2, as well as its phase transition hysteresis. From the application perspective, this paper summarizes the modulation content under various external excitations and the element doping effects. Finally, this paper summarizes the classic VO2‐based devices, and points out the development direction and potential of VO2 in optics and electronics. This review provides a systematic summary of VO2, which is useful for its practical applications.

Epitaxy of Monoclinic VO2 on Large-Misfit 3m Template Enabled by a Metastable Interfacial Layer

“… 13 Besides temperature, the MIT of VO 2 can also be driven by electric field through the Joule self-heating effect. 40 , 41 As shown in Figure 5 b, the I– V curve is highly nonlinear— I increases gradually with V at the beginning of the voltage sweep; it abruptly jumps from 1.7 to 10.0 mA as V rises to 15.9 V, indicating the occurrence of a monoclinic-to-rutile phase transition. Upon decreasing the temperature, a large hysteresis (Δ V = 8.7 V) appears and the VO 2 film transforms back to the insulator state at V = 7.2 V. All these findings are similar to those reported previously, 13 indicating a high electrical quality of the VO 2 film on CFO(111) which has important implications for device applications.…”