发表机构
Cornell University; Nanyang Technological University; National Institute for Materials Science（康奈尔大学; 南洋理工大学; 物质材料研究机构）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究发现流体静压力可增强滑动铁电体（平行堆叠双层氮化硼）的极化，而非抑制，极化近似线性增加80%至1.66 GPa，为超薄滑动电子存储器提供调控手段。
AI 中文摘要
流体静压力通常通过削弱偏离中心的离子畸变来抑制传统位移型铁电体的极化。滑动铁电体可能提供一种相反的情况，因为它们的极化源于依赖于堆叠的层间电荷转移，而非晶胞内的离子位移。本文表明，流体静压力能够增强而非抑制平行堆叠双层氮化硼（一种典型的滑动铁电体）的极化。在铁电氮化硼双层上放置一层石墨烯，用于传感压力下极化的演变。压力增强了层间电势和铁电极化，后者近似线性地增加80%，直至1.66 GPa。这些结果确立了流体静压力压缩作为滑动铁电极化的调控参数，对超薄滑动电子存储器器件具有潜在意义。
英文摘要
Hydrostatic pressure commonly suppresses polarization in conventional displacive ferroelectrics by weakening the off-center ionic distortion. Sliding ferroelectrics may provide a contrasting case because their polarization arises from stacking-dependent interlayer charge transfer rather than intra-unit-cell ionic displacement. Here, hydrostatic pressure is shown to enhance, rather than suppress, the polarization of parallel-stacked bilayer boron nitride, a prototypical sliding ferroelectric. A graphene layer placed on top of a ferroelectric boron nitride bilayer is used for sensing the evolution of polarization under pressure. The pressure enhances both the interlayer potential and the ferroelectric polarization, with the latter increasing approximately linearly by 80% up to 1.66GPa. These results establish hydrostatic compression as a tuning parameter for sliding-ferroelectric polarization, with potential implications for ultrathin slidetronic memory devices.
