https://scholars.lib.ntu.edu.tw/handle/123456789/576935
Title: | Operation bandwidth of negative capacitance characterized by the frequency response of capacitance magnification in ferroelectric/dielectric stacks | Authors: | Jiang Y.-S Jeng Y.-E Yin Y.-T Huang K.-W Chang T.-J Wang C.-I Chao Y.-T CHAO-HSIN WU MIIN-JANG CHEN |
Keywords: | Bandwidth; Ferroelectricity; Frequency response; Hafnium compounds; Zirconium compounds; Model-based OPC; Multi domains; Negative capacitance; Operation bandwidth; Operation speed; Paraelectrics; Series capacitance; Capacitance | Issue Date: | 2021 | Journal Volume: | 9 | Journal Issue: | 4 | Start page/Pages: | 1401-1409 | Source: | Journal of Materials Chemistry C | Abstract: | The ferroelectric (FE) negative capacitance (NC) has emerged as a potential candidate for low-power electronics. In this study, we experimentally demonstrate the capacitance magnification of a paraelectric (PE) HfO2capacitance (CHfO2) connected in series with a FE ZrO2capacitance (CZrO2), which is higher than the value predicted by the series capacitance formula (CZrO2?1+CHfO2?1)?1and has a capacitance magnification ratio in the range 1.79-2.24. A model based on the switching of the net polarization in FE multi-domains is proposed to explain the capacitance magnification. In addition, the operation bandwidth of the NC effect was investigated by the frequency response of the capacitance magnification from 1 kHz to 10 GHz for the first time. The result reveals vanishing of the capacitance magnification at a frequency of about tens of megahertz, which suggests that the operation speed of NC is below ?100 MHz. ? The Royal Society of Chemistry 2021. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100511640&doi=10.1039%2fd0tc04025h&partnerID=40&md5=739901b4ec328ec7b7c08ca15985b83c https://scholars.lib.ntu.edu.tw/handle/123456789/576935 |
ISSN: | 20507534 | DOI: | 10.1039/d0tc04025h |
Appears in Collections: | 材料科學與工程學系 |
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