论文标题
铁电容的瞬态负电容的热力学驱动力
Thermodynamic driving force of transient negative capacitance of ferroelectric capacitors
论文作者
论文摘要
本文研究了电阻器和铁电容器（R-FEC）的串联电路中瞬时负电容（NC）的热力学驱动力。我们发现，使用广泛使用的Landau-Khalatnikov（L-K）理论，即Gibbs自由能的最低限度，无法解释瞬态NC。瞬态NC现象的热力动力驱动力是弹性Gibbs自由能与电动极化工作之间差异的最小值。瞬态NC现象的出现并不是由于广泛接受的观点，即铁电偏振经过弹性Gibbs自由能景观（GA）的负曲率区域。取而代之的是，当GA的能屏障消失时，会出现瞬态NC现象。瞬态NC取决于R-FEC电路中的内在铁电材料参数和外在因子。
This paper investigates the thermodynamic driving force of transient negative capacitance (NC) in the series circuit of the resistor and ferroelectric capacitor (R-FEC). We find that the widely used Landau-Khalatnikov (L-K) theory, that is, the minimum of the Gibbs free energy, is inapplicable to explain the transient NC. The thermodynamic driving force of the transient NC phenomenon is the minimum of the difference between the elastic Gibbs free energy and the electric polarization work. The appearance of the transient NC phenomenon is not due to the widely accepted view that the ferroelectric polarization goes through the negative curvature region of elastic Gibbs free energy landscape (Ga). Instead, the transient NC phenomenon appears when the energy barrier of Ga disappears. The transient NC is dependent on both the intrinsic ferroelectric material parameters and extrinsic factors in the R-FEC circuit.
