title: Liquid-Gated High Mobility and Quantum Oscillation of the Two-Dimensional Electron Gas at an Oxide Interface.
abstract: Electric field effect in electronic double layer transistor (EDLT) configuration with ionic liquids as the dielectric materials is a powerful means of exploring various properties in different materials. Here, we demonstrate the modulation of electrical transport properties and extremely high mobility of two-dimensional electron gas at LaAlO3/SrTiO3 (LAO/STO) interface through ionic liquid-assisted electric field effect. With a change of the gate voltages, the depletion of charge carrier and the resultant enhancement of electron mobility up to 19 380 cm(2)/(V s) are realized, leading to quantum oscillations of the conductivity at the LAO/STO interface. The present results suggest that high-mobility oxide interfaces, which exhibit quantum phenomena, could be obtained by ionic liquid-assisted field effect.
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.|Department of Physics, National University of Singapore , Singapore 117542, Singapore.
authors.forename: Shengwei
authors.initials: S
authors.lastname: Zeng
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.
authors.forename: Weiming
authors.initials: W
authors.lastname: Lü
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Huang
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.
authors.forename: Zhiqi
authors.initials: Z
authors.lastname: Liu
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.|Department of Physics, National University of Singapore , Singapore 117542, Singapore.
authors.forename: Kun
authors.initials: K
authors.lastname: Han
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.
authors.forename: Kalon
authors.initials: K
authors.lastname: Gopinadhan
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.|National University of Singapore Graduate School for Integrative Sciences and Engineering (NGS) , 28 Medical Drive, Singapore 117456, Singapore.
authors.forename: Changjian
authors.initials: C
authors.lastname: Li
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.|Department of Materials Science and Engineering, National University of Singapore , Singapore 117575, Singapore.
authors.forename: Rui
authors.initials: R
authors.lastname: Guo
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.|Department of Physics, National University of Singapore , Singapore 117542, Singapore.
authors.forename: Wenxiong
authors.initials: W
authors.lastname: Zhou
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.|Department of Physics, National University of Singapore , Singapore 117542, Singapore.
authors.forename: Haijiao Harsan
authors.initials: HH
authors.lastname: Ma
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.
authors.forename: Linke
authors.initials: L
authors.lastname: Jian
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.|Department of Physics, National University of Singapore , Singapore 117542, Singapore.|National University of Singapore Graduate School for Integrative Sciences and Engineering (NGS) , 28 Medical Drive, Singapore 117456, Singapore.|Department of Materials Science and Engineering, National University of Singapore , Singapore 117575, Singapore.|Department of Electrical and Computer Engineering, National University of Singapore , Singapore 117576, Singapore.
authors.forename: Thirumalai
authors.initials: T
authors.lastname: Venkatesan
authors.affiliation: NUSNNI-NanoCore, National University of Singapore , Singapore 117411, Singapore.|Department of Physics, National University of Singapore , Singapore 117542, Singapore.|National University of Singapore Graduate School for Integrative Sciences and Engineering (NGS) , 28 Medical Drive, Singapore 117456, Singapore.
authors.lastname: Ariando
keywords: Ionic liquid; LaAlO3/SrTiO3 interfaces; Shubnikov−de Haas (SdH) oscillation; electric field effect; electronic double layer transistors (EDLT); mobility