Sliding twin-domains in self-heated needle-like VO₂ single crystals.

ABSTRACT: The prototypical metal-insulator transition in VO₂ at 340 K is from a high-temperature rutile phase to a low-temperature monoclinic phase. The lower symmetry of the monoclinic structure removes the degeneracy of the two equivalent directions of the tetragonal structure, giving rise to twin domains. Since formation of domain walls require energy most needle-like monoclinic single crystal are single-domain. The mixed metal-insulator state in self-heated needle-like single crystals exhibits various domain patterns, the most remarkable being static insulating triangular domains embedded in the metal and narrow insulating domains sliding along the metallic background in the direction of the electric current. Reported here are results obtained for some rare needle-like twinned VO

SUBMITTER: Fisher B 

PROVIDER: S-EPMC7176718 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature