TY - JOUR
KW - Ferroelectric materials
KW - Boltzmann equation
KW - Ferroelectricity
KW - Negative capacitance
KW - Ferroelectric devices
KW - Ferroelectric capacitors
KW - Capacitance
KW - Ferroelectric films
KW - Energy dissipation
KW - Capacitors
KW - Boltzmann distribution
KW - Direct measurement
KW - Epitaxial ferroelectric films
KW - Fundamental barriers
KW - Intrinsic energy
KW - New applications
AU - A.I Khan
AU - K Chatterjee
AU - B Wang
AU - S Drapcho
AU - L You
AU - C Serrao
AU - S.R Bakaul
AU - Ramamoorthy Ramesh
AU - S Salahuddin
AB - The Boltzmann distribution of electrons poses a fundamental barrier to lowering energy dissipation in conventional electronics, often termed as Boltzmann Tyranny. Negative capacitance in ferroelectric materials, which stems from the stored energy of a phase transition, could provide a solution, but a direct measurement of negative capacitance has so far been elusive. Here, we report the observation of negative capacitance in a thin, epitaxial ferroelectric film. When a voltage pulse is applied, the voltage across the ferroelectric capacitor is found to be decreasing with time - in exactly the opposite direction to which voltage for a regular capacitor should change. Analysis of this inductance -like behaviour from a capacitor presents an unprecedented insight into the intrinsic energy profile of the ferroelectric material and could pave the way for completely new applications. © 2015 Macmillan Publishers Limited. All rights reserved.
BT - Nature Materials
DO - 10.1038/nmat4148
LA - eng
M1 - 2
N1 - cited By 302
N2 - The Boltzmann distribution of electrons poses a fundamental barrier to lowering energy dissipation in conventional electronics, often termed as Boltzmann Tyranny. Negative capacitance in ferroelectric materials, which stems from the stored energy of a phase transition, could provide a solution, but a direct measurement of negative capacitance has so far been elusive. Here, we report the observation of negative capacitance in a thin, epitaxial ferroelectric film. When a voltage pulse is applied, the voltage across the ferroelectric capacitor is found to be decreasing with time - in exactly the opposite direction to which voltage for a regular capacitor should change. Analysis of this inductance -like behaviour from a capacitor presents an unprecedented insight into the intrinsic energy profile of the ferroelectric material and could pave the way for completely new applications. © 2015 Macmillan Publishers Limited. All rights reserved.
PB - Nature Publishing Group
PY - 2015
SP - 182
EP - 186
T2 - Nature Materials
TI - Negative capacitance in a ferroelectric capacitor
VL - 14
SN - 14761122
ER -