标题： 超快偏振开关通过铁电CuInP$_2$S$_6$中的激光激活离子迁移 显示英文标题

标题： Ultrafast Polarization Switching via Laser-activated Ionic Migration in Ferroelectric CuInP$_2$S$_6$

摘要： 作为一种层状铁电材料，CuInP2S6因其强健的铁电态和在存储器件中的潜在应用而受到广泛关注。 在本工作中，我们证明，通过短激光脉冲可以在数百飞秒内实现铁电CuInP$_2$S$_6$中的超快可逆极化切换。 具体而言，光激发触发了CuInP$_2$S$_6$中集体离子迁移和铁电性的反转，揭示了一种通过光学激发访问不同铁电相的新途径。 我们的研究结果表明，激光脉冲显著改变了过渡势垒，促进了由光掺杂效应驱动的离子传输。 这种激光诱导的离子迁移对于实现极化转换至关重要，为探索和控制奇异量子相提供了新途径。 这些见解为在前所未有的超快时间尺度上操控铁电态和电子性质打开了令人兴奋的可能性。 显示英文摘要

摘要： As a layered ferroelectric material, CuInP2S6 has garnered significant attention for its robust ferroelectric state and potential applications in memory devices. In this work, we demonstrate that with short laser pulses ultrafast reversible polarization switching within hundreds of femtoseconds can be achieved in ferroelectric CuInP$_2$S$_6$. Specifically, photoexcitation triggers collective ionic migration and ferroelectricity reversal in CuInP$_2$S$_6$, revealing a novel pathway to access different ferroelectric phases through optical excitation. Our findings indicate that laser pulses substantially alter the transition barriers, promoting ionic transport facilitated by the photodoping effect. This laser-induced ionic migration proves critical for enabling polarization transitions, offering a novel pathway to explore and control exotic quantum phases. These insights open exciting possibilities for manipulating ferroelectric states and electronic properties on an unprecedented ultrafast timescale.