Collaborative Research: Correlated States in Twisted Hetero-bilayer Transition Metal Dichalcogenides

合作研究：扭曲异双层过渡金属二硫属化物中的相关态

• 批准号: 2104805
• 负责人: Yongtao Cui
• 金额: $ 27.5万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2104805&HistoricalAwards=false
• 关键词: Collaborative; Research; Correlated; States; Twisted

Nontechnical Abstract: In conventional materials, electrons travel in the periodic arrays of atoms without "talking" (interacting) to each other. When two monolayers of atomically thin materials, also knowns as two-dimensional (2D) materials, are stacked together with a well-controlled twist angle between these two layers, they form a new periodic structure with interesting properties. In this collaborative project, the PIs investigate these 2D materials to gain knowledge that could enable transformative technology innovations such as high-temperature superconductivity, quantum electronics and optoelectronics. This project integrates an education component to train students and build a strong workforce for quantum science and technologies. Under-represented groups are particularly encouraged and included in the education programs.Technical Abstract: Correlated states such as Mott insulators and Wigner crystals remain intriguing subjects of physics. More recently, twisted hetero-bilayer transition metal dichalcogenides (TMDs) have emerged as a new platform with even more enhanced correlation strength, and their strong spin-orbit coupling and presence of bandgaps provide new avenues to explore spin-related physics and optoelectronics in correlated states. In this collaborative proposal, the PIs explore the moiré superlattices formed by twisted hetero-bilayer TMDs. The research plan includes two main thrusts. Thrust I is to characterize the interaction strength of the correlated states and study its relationship with moiré structure parameters and external controls to manipulate the correlated states. Thrust II is to explore new correlated states arising from interactions with other electronic phases, such as the interplay of correlated states with Landau levels, the effect of strong correlation on valley physics and excitonic physics of the moiré superlattice, and other types of new states that could possibly arise in this strongly interacting system. The collaborative project trains graduate and undergraduate students are trained for future placement in quantum science and technologies. The project also creates research modules for outreach to K-12 students and actively involves under-represented groups.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：在常规材料中，电子在原子的时期旅行，而无需“交谈）。原子上薄材料的单层，也称为两种时期（2D）材料两层，具有有趣的特性的新周期性结构。 NDER代表性的群体在教育计划中参与其中。技术摘要：硫磺晶体仍然吸引了更多记录的物理学主题。在此协作建议中，带有自旋相关的物理学和光电子的轨道耦合，以探索与自旋相关的物理和光电子的耦合。它的关系与操纵相关状态II的结构参数和外部是探索新的相关性stes arisacti与其他电子相位的相关状态Moiré超级晶格的物理学以及其他类型的新州。具有Toundation的智力优点和更广泛影响的评论标准，值得一提的评估。