Reversible superconductor-insulator transition in LiTi2O4 induced by Li-ion electrochemical reaction.

ABSTRACT: Transition metal oxides display various electronic and magnetic phases such as high-temperature superconductivity. Controlling such exotic properties by applying an external field is one of the biggest continuous challenges in condensed matter physics. Here, we demonstrate clear superconductor-insulator transition of LiTi2O4 films induced by Li-ion electrochemical reaction. A compact electrochemical cell of pseudo-Li-ion battery structure is formed with a superconducting LiTi2O4 film as an anode. Li content in the film is controlled by applying a constant redox voltage. An insulating state is achieved by Li-ion intercalation to the superconducting film by applying reduction potential. In contrast, the superconducting state is reproduced by applying oxidation potential to the Li-ion interca

SUBMITTER: Yoshimatsu K 

PROVIDER: S-EPMC4635382 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature