论文标题
温度辅助压电力显微镜：探测铁龙中局部温度诱导的相变
Temperature-assisted Piezoresponse Force Microscopy: Probing Local Temperature-Induced Phase Transitions in Ferroics
论文作者
论文摘要
温度辅助的压电力显微镜（TPFM）在尖端表面连接处的局部加热和偏置的组合开放了用于探测铁龙中局部温度诱导的相位过渡的途径，探索铁电气中极化动态的温度依赖性，并通过潜在的耦合现象训练强度现场训练，并通过强度验证的现象训练。在这里，我们分析了TPFM中的信号形成机制，并探讨了模型铁电材料中热和偏置诱导的切换之间的相互作用。我们进一步探讨了挠性和热极化效应对局部机电反应的贡献，并证明后者对于“软”铁电剂可能很重要。这些结果为TPFM观测值进行定量解释建立了一个框架，预测了由非本地热梯度诱导的极化切换驱动的非平凡的开关和放松现象的出现，并为探索各种非中心含量和中心对比的材料的热极化效应的物理开辟了途径。
Combination of local heating and biasing at the tip-surface junction in temperature-assisted piezoresponse force microscopy (tPFM) opens the pathway for probing local temperature induced phase transitions in ferroics, exploring the temperature dependence of polarization dynamics in ferroelectrics, and potentially discovering coupled phenomena driven by strong temperature- and electric field gradients. Here, we analyze the signal formation mechanism in tPFM and explore the interplay between thermal- and bias-induced switching in model ferroelectric materials. We further explore the contributions of the flexoelectric and thermopolarization effects to the local electromechanical response, and demonstrate that the latter can be significant for "soft" ferroelectrics. These results establish the framework for quantitative interpretation of tPFM observations, predict the emergence the non-trivial switching and relaxation phenomena driven by non-local thermal gradient-induced polarization switching, and open a pathway for exploring the physics of thermopolarization effects in various non-centrosymmetric and centrosymmetric materials.
