Abstract
Transient negative capacitance (NC), as an available dynamic charge effect achieved in resistor-ferroelectric capacitor (R-FEC) circuits, has triggered a series of theoretical and experimental works focusing on its physical mechanism and device application. Here, we analytically derived the effects of different mechanical conditions on the transient NC behaviors in the R-FEC circuit based on the phenomenological model. It shows that the ferroelectric capacitor can exhibit either NC (i.e., “single NC” and “double NC”) or positive capacitance, depending on the mechanical condition and temperature. Further numerical calculations show that the voltage drop caused by NC can be effectively controlled by temperature, applied stress, or strain. The relationship between NC voltage drop and system configurations including external resistance, dynamical coefficient of polarization, and input voltage are presented, showing diverse strategies to manipulate the NC effect. These results provide theoretical guidelines for rational design and efficient control of NC-related electronic devices.
摘要
瞬态负电容效应作为一种在电阻-铁电电容器电路中实现的可用动态电荷效应, 已受到科研人员的广泛关注. 近年来, 已有许多 研究者针对其物理机制与器件应用开展了一系列理论与实验研究. 本文通过解析推导研究了不同力学条件对电阻-铁电电容器电路中 的瞬态负电容效应的影响, 结果显示在不同的力学与温度条件下, 一级铁电体电容器可以发生不同的负电容效应(包括单负电容与双 负电容效应)以及不发生负电容效应. 数值模拟的结果表明, 较低的温度、较大的施加应力以及较大的压缩失配应变可以显著地增加 负电容的电压降. 此外, 负电容电压降与不同的电路配置如外电阻、极化动力学系数、输入电压的关系也被模拟计算所揭示, 展现出 了瞬态负电容效应的丰富可调控策略. 这些结果为实验上合理而高效地利用和设计负电容相关功能电子器件提供了理论参考.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grants Nos. 12222214, 12132020, 12002400, and 12172386), by Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices (Grant No. 2022B1212010008), by the National Natural Science Foundation of Guangdong Province (Grant No. 2021B1515020021) and by the Shenzhen Science and Techonlogy Program (Grant Nos. 202206193000001 and 20220818181805001).
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Author contributions Qian He: Formal analysis, Investigation, Validation, Writing – original draft, Writing – review & editing. Weijin Chen: Conceptualization, Data curation, Funding acquisition, Software, Supervision, Writing – review & editing. Xin Luo: Funding acquisition, Project administration, Supervision. Yue Zheng: Funding acquisition, Project administration, Resources, Supervision, Writing – review & editing.
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He, Q., Chen, W., Luo, X. et al. Mechanical manipulation of the transient negative capacitance effect in resistor-ferroelectric capacitor circuit. Acta Mech. Sin. 41, 423221 (2025). https://doi.org/10.1007/s10409-024-23221-x
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DOI: https://doi.org/10.1007/s10409-024-23221-x