title: Emergence of Negative Capacitance in Multidomain Ferroelectric-Paraelectric Nanocapacitors at Finite Bias.
abstract: The emergence of negative capacitance in an ultrathin ferroelectric/paraelectric bilayer capacitor under electrical bias is examined using first-principles simulation. An antiferroelectric-like behavior is predicted, and negative capacitance is shown to emerge when the monodomain state becomes stable after bias application. The polydomain-monodomain transition is also shown to be a source of capacitance enhancement.
authors.affiliation: The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8581, Japan.
authors.forename: Shusuke
authors.initials: S
authors.lastname: Kasamatsu
authors.affiliation: Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Watanabe
authors.affiliation: Department of Materials Science and Engineering and Inter-university Semiconductor Research Center, Seoul National University, Seoul, 151-742, South Korea.
authors.forename: Cheol Seong
authors.initials: CS
authors.lastname: Hwang
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.
authors.forename: Seungwu
authors.initials: S
authors.lastname: Han
keywords: ferroelectric; first principles; negative capacitance