期刊
NATURE MATERIALS
卷 14, 期 2, 页码 182-186出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT4148
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资金
- Office of Naval Research (ONR)
- Center for Low Energy Systems Technology (LEAST), one of the six SRC STARnet Centers - MARCO
- DARPA
- NSF E3S Center at Berkeley
The Boltzmann distribution of electrons poses a fundamental barrier to lowering energy dissipation in conventional electronics, often termed as Boltzmann Tyranny(1-5). 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(1-3). 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.
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