论文标题
基于非线性霍尔整流器的高效能量收获
High-efficiency energy harvesting based on nonlinear Hall rectifier
论文作者
论文摘要
非中心对称量子材料可以通过零磁场的非线性霍尔效应将AC输入电流转换为直流横向电流。我们分析了此类``Hall Rectifier''的AC-DC功率转换效率，并建议其在无线充电和能源收集中的应用。我们的主要观察结果是，霍尔电压的发展导致纵向抵抗的改变，导致由于非线性霍尔效应而违反了欧姆法律。这种反馈机制平衡了输入功率和输出功率，因此对于理解从源到负载的功率传递至关重要。我们在材料参数，外部负载电阻和输入功率方面得出了功率转换效率的一般表达。由于大厅电流垂直于电场，并且不会产生焦耳加热，因此当霍尔角度（随输入功率增加）时，我们获得了高功率转换效率，并且对载荷电阻进行了优化。还讨论了高效霍尔整流器的有前途的材料。
Noncentrosymmetric quantum materials can convert AC input current into DC transverse current through the nonlinear Hall effect at zero magnetic field. We analyze the AC-DC power conversion efficiency of such ``Hall rectifier'' and suggest its application in wireless charging and energy harvesting. Our key observation is that the development of Hall voltage results in a change of longitudinal resistance, resulting in a violation of Ohm's law due to the nonlinear Hall effect. This feedback mechanism balances the input power and the output power and hence is crucial to understanding the power transfer from source to load. We derive a general expression for the power conversion efficiency in terms of material parameters, external load resistance, and input power. As the Hall current is perpendicular to the electric field and does not generate Joule heating by itself, we obtain high power conversion efficiency when the Hall angle (which increases with the input power) is large and the load resistance is optimized. Promising materials for high-efficiency Hall rectifiers are also discussed.
