Giant reversible, facet-dependent, structural changes in a correlated-electron insulator induced by ionic liquid gating.

ABSTRACT: The use of electric fields to alter the conductivity of correlated electron oxides is a powerful tool to probe their fundamental nature as well as for the possibility of developing novel electronic devices. Vanadium dioxide (VO2) is an archetypical correlated electron system that displays a temperature-controlled insulating to metal phase transition near room temperature. Recently, ionic liquid gating, which allows for very high electric fields, has been shown to induce a metallic state to low temperatures in the insulating phase of epitaxially grown thin films of VO2. Surprisingly, the entire film becomes electrically conducting. Here, we show, from in situ synchrotron X-ray diffraction and absorption experiments, that the whole film undergoes giant, structural changes on gating in which

SUBMITTER: Jeong J 

PROVIDER: S-EPMC4313825 | biostudies-literature | 2015 Jan

REPOSITORIES: biostudies-literature