Íñiguez, J;
Zubko, P;
Luk'yanchuk, I;
Cano, A;
(2019)
Ferroelectric negative capacitance.
Nature Reviews Materials
, 4
pp. 243-256.
10.1038/s41578-019-0089-0.
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Abstract
The capacitor is a key element of electronic devices and is characterized by positive capacitance. However, a negative capacitance (NC) behaviour may occur in certain cases and implies a local voltage drop opposed to the overall applied bias. Therefore, a local NC response results in voltage enhancement across the rest of the circuit. Within a suitably designed heterostructure, ferroelectrics display such an NC effect, and various ferroelectric-based microelectronic and nanoelectronic devices have been developed, showing improved performance attributed to NC. However, the exact physical nature of the NC response and direct experimental evidence remain elusive or controversial thus far. In this Review, we discuss the physical mechanisms responsible for ferroelectric NC, tackling static and transient NC responses. We examine ferroelectric responses to voltage and charge, as well as ferroelectric switching, and discuss proof-of-concept experiments and possibilities for device implementation. Finally, we highlight different approaches for the optimization of the intrinsic NC response to maximize voltage amplification.
Type: | Article |
---|---|
Title: | Ferroelectric negative capacitance |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1038/s41578-019-0089-0 |
Publisher version: | https://doi.org/10.1038/s41578-019-0089-0 |
Language: | English |
Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | Electrical and electronic engineering, Electronic devices, Ferroelectrics and multiferroics |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
URI: | https://discovery.ucl.ac.uk/id/eprint/10073127 |
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