2019年5月15日 · We review the available data on the structures and Raman spectra of vanadium oxides, VOx. We also present our own results concerning such phases as α- and β-vanadium, V14O6, VO, V2O3, V3O5, several p...

2021年11月5日 · Vapor transport method has been successfully used to synthesize high quality VO 2 thin films on SiO 2 /Si substrate using V 2 O 5 as a precursor in an inert-gas environment. The morphological and...

2004年7月15日 · We have used Raman spectra to study the phase transition in VO 2 thin films. Hysteretic loops observed demonstrate the usefulness of Raman microscopy to study the structure and phase transition properties in VO 2 thin films.

2020年2月6日 · We have observed a new collective mode in the low-frequency Raman spectra of all three insulating M1, M2 and T phases. We identify this mode with the breather (singlet spin excitation) mode about...

2002年5月1日 · In summary, we have observed 17 out of 18 Raman allowed vibrations in the low-temperature monoclinic phase of VO 2. In the high-temperature phase we observed four broad peaks, which seem to be reminiscent of the Raman allowed vibration of the rutile lattice.

2022年7月1日 · In situ Raman-scattering mapping scans further prove that the monoclinic-to-rutile phase transition occurs gradually in polycrystalline VO 2 films, in which monoclinic and rutile phases coexist from 55 °C to 80 °C. Electrical resistance of the film will change dramatically when the volume fraction of monoclinic phase decreases to 43.5%, or ...

2014年5月6日 · In this paper, we report our effort to systematically study the occurrence of the M2 phase in epitaxial VO 2 thin films, using both Raman and Fourier transform infrared (FTIR) spectroscopies at...

A systematic study of the phase transition induced Raman enhancement on VO 2 nanosheets reveals that increase in the crystal symmetry from VO 2 (B) to VO 2 (M) and to VO 2 (R) results in a dramatic decline in the enhancement ability of the probe molecules.

2019年5月1日 · This review summarizes Raman scattering data for different stable and metastable phases of vanadium oxides. We analyze literature data on crystal structures existing in the binary vanadium ...

2024年2月1日 · Vanadium dioxide (VO 2) is a strongly correlated oxide that exhibits a reversible first-order semiconductor-to-metal phase transition (SMT) that occurs at T SMT = 68 °C in pristine samples but can be lowered down to 30–40 °C by dopants, strain, or stoichiometry [[1], [2], [3]].