Electric field induced metallic behavior in thin crystals of ferroelectric <b> <i>α</i> </b>-In2Se3
Justin R. Rodriguez, William Murray, Kazunori Fujisawa, Seng Huat Lee, Alexandra L. Kotrick, Yixuan Chen, Nathan Mckee, Sora Lee, Mauricio Terrones, Susan Trolier-McKinstry, Thomas N. Jackson, Zhiqiang Mao, Zhiwen Liu, Ying Liu
Abstract
Ferroelectric semiconductor field effect transistors (FeSmFETs), which employ ferroelectric semiconducting thin crystals of α-In2Se3 as the channel material as opposed to the gate dielectric in conventional ferroelectric FETs (FeFETs), were prepared and measured from room to liquid-helium temperatures. These FeSmFETs were found to yield evidence for the reorientation of electrical polarization and an electric field-induced metallic state in α-In2Se3. Our findings suggest that FeSmFETs can serve as a platform for the fundamental study of ferroelectric metals as well as the exploration of potential applications of semiconducting ferroelectrics.