Negative capacitance in a ferroelectric capacitor
Publication Type | Journal Article
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Authors | |
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DOI |
10.1038/nmat4148
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Abstract |
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.
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Notes |
cited By 302
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Journal |
Nature Materials
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Volume |
14
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Year of Publication |
2015
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Number |
2
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Pagination |
182-186
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Publisher |
Nature Publishing Group
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ISSN Number |
14761122
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Keywords |
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Research Areas | |
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