CAREER: Interplay of sliding ferroelectricity, spin and charge orderings in layered quantum materials

职业：层状量子材料中滑动铁电性、自旋和电荷排序的相互作用

• 批准号: 2237761
• 负责人: Jun Xiao
• 金额: $ 66.22万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-04-01 至 2028-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2237761&HistoricalAwards=false
• 关键词: CAREER; Interplay; sliding; ferroelectricity; spin

Non-technical abstract:This project focuses on understanding of properties of a new class of quantum materials with unique properties, known as two-dimensional layered materials. By modeling, characterizing, and engineering the novel physics, this research aims to understand the materials properties and achieve their control. These materials can establish a new platform for energy-efficient and high-speed memory and logic devices, and compact and programmable quantum simulators to address the growing information and energy demands. Integrated with the research, the project aims to promote participation in STEM, focusing on undergraduates and K-12 teachers from groups historically underrepresented in STEM and from rural areas in Wisconsin. The PI partners with the Materials Research Science and Engineering Centers (MRSEC) education group and Engineering EXPO at the University of Wisconsin-Madison to organize “2D ferroelectrics for energy-efficient future” education and outreach program including nanomaterials research, STEM education activities development for high school classrooms, and professional development seminars.Technical abstract:Two-dimensional (2D) layered materials are promising quantum material platforms with many important electronic properties, such as magnetism, strong electron correlation, superconductivity, and ferroelectricity. However, the interplay of ferroelectricity and other quantum properties is significantly unexplored because most current 2D quantum materials are nonpolar. Such scarcity hinders many exciting research subjects such as 2D multiferroics, dipolar Hubbard model, reconfigurable charge orderings, and superconducting diode effects. Recent discoveries of “sliding ferroelectricity” from polar stacking of nonpolar layers indicate it is possible to design ferroelectrics out of the vast majority of 2D materials with parent nonpolar compounds. The ferroelectricity can be switched via interlayer sliding, where the ultralow van der Waals sliding barrier is much smaller than that of any other ferroelectrics. The PI’s approach is to design and assemble various nonpolar 2D magnetic monolayers into polar stacking structures, where spin and charge orderings are hypothesized to be sensitive to ferroelectricity-driven stacking evolution. To fully understand the new quantum orderings and coupling physics, the research team use an in-house multimodal optical, electrical, and magnetic characterization platform to enable simultaneous access to ferroelectricity, magnetism, and electron correlation at various spatial, temporal, and energy scales. Furthermore, the PI will quantify and dynamic control of coupling strength by electrostatic doping and ultrafast light engineering. The research will advance the understanding of many-body interplay in two-dimensional quantum materials and pave the way for device applications using developed polar and Moiré 2D magnets in low-power electronics, ultrahigh-speed spintronics, and reconfigurable quantum simulation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术摘要：该项目的重点是了解具有独特特性（称为二维分层材料）的新类量子材料的性质。通过建模，表征和设计新颖的物理学，该研究旨在了解材料特性并实现其控制。这些材料可以为节能和高速内存和逻辑设备建立一个新的平台，以及紧凑而可编程的量子模拟器，以满足不断增长的信息和能源需求。该项目与研究融为一体，旨在促进参与STEM的参与，重点关注从历史上不足的sem和威斯康星州粗糙地区的本科生和K-12教师。 PI与材料研究科学与工程中心（MRSEC）教育小组和工程博览会在威斯康星大学麦迪逊分校的教育小组和工程博览会组织，以组织“ 2D小铁电脑的能源有效未来”教育和外展计划，包括纳米材料研究，包括纳米材料研究，包括高中课堂的STEM教育活动以及专业材料的材料，以及许多材料的材料。电子特性，例如磁性，强电子相关性，超导性和铁电性。但是，由于大多数当前的2D量子材料是非极性的，因此铁电性和其他量子性能的相互作用是显着尚未探索的。这种稀缺性阻碍了许多令人兴奋的研究主题，例如2D多表情，偶极性哈伯德模型，可重新配置的收费订单以及超导性模具效应。非极性层极性堆叠中“滑动铁电性”的最新发现表明，可以从具有母体非极性化合物的绝大多数2D材料中设计铁电。铁电性可以通过层间滑动切换，其中超大范德华滑动屏障比任何其他铁电的滑动屏障都小得多。 PI的方法是设计和组装各种非极性2D磁性单层中极地堆叠结构，其中旋转和电荷订单被假设对铁电性驱动的堆叠进化敏感。为了充分了解新的量子顺序和耦合物理，研究团队使用内部多模式的光学，电气和磁性表征平台，使在各种空间，临时和能量尺度上同时访问铁电，磁性和电子相关性。此外，PI将通过静电掺杂和超快轻型工程来量化和动态控制耦合强度。这项研究将在二维量子材料中提高对多体相互作用的理解，并为使用Polar和Moiré2D磁铁在低功率电子设备，Ultrahigh-Sppeed Spytronics和可重新配置的量子模拟中为设备应用铺平道路，这是NSF的法定任务，并通过评估构成的精力来审查了这一奖项。

项目成果

Stacking Order Engineering of Two-Dimensional Materials and Device Applications

• DOI: 10.1021/acs.chemrev.3c00618
• 发表时间: 2023-12-27
• 期刊: CHEMICAL REVIEWS
• 影响因子: 62.1
• 作者: Fox，Carter;Mao，Yulu;Xiao，Jun
• 通讯作者: Xiao，Jun