标题： 铁电振幅切换和连续记忆 显示英文标题

标题： Ferroelectric amplitude switching and continuous memory

摘要： 尽管铁电系统固有地表现出二进制开关行为，但模拟存储器件的最新进展激发了对实现连续存储状态的兴趣。 在本工作中，我们展示了在成分梯度的Ba1-xSrxTiO3异质结构中，在介观尺度上的铁电振幅开关，实现了极化幅度的连续调制而不改变其方向，我们将其定义为振幅开关。 通过开关电流测量、压电响应力显微镜和Landau-Ginzburg-Devonshire模拟，我们揭示了成分梯度铁电异质结构可以通过具有平坦最小值的双势阱势能表现出振幅开关行为。 这种行为支持稳定、连续的极化状态，并为模拟存储应用建立了一个新平台。 这些发现将振幅开关引入为序参数的新动态，为高效且可靠的模拟存储系统铺平了道路。 显示英文摘要

摘要： Although ferroelectric systems inherently exhibit binary switching behavior, recent advances in analog memory device have spurred growing interest in achieving continuous memory states. In this work, we demonstrate ferroelectric amplitude switching at the mesoscopic scale in compositionally graded Ba1-xSrxTiO3 heterostructures, enabling continuous modulation of polarization magnitude without altering its direction, which we defined as amplitude switching. Using switching current measurement, piezoresponse force microscopy and Landau-Ginzburg-Devonshire simulations, we reveal that compositionally graded ferroelectric heterostructure can possess amplitude switching behavior through a double well potential with flattened minima. This behavior supports stable, continuous polarization states and establishes a new platform for analog memory applications. These findings introduce amplitude switching as a new dynamic of the order parameter, paving the way for energy-efficient and reliable analog memory systems.