RII Track-4:NSF: Direct and Complete Characterization of Electronic Properties of Materials Under Pressure

RII Track-4：NSF：压力下材料电子特性的直接完整表征

• 批准号: 2327363
• 负责人: Dean Smith
• 金额: $ 21.92万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2025-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2327363&HistoricalAwards=false
• 关键词: RII; Track; NSF; Direct; Complete

The diamond anvil cell is a powerful tool for probing materials at extreme pressures (thousands to millions of atmospheres), but electronic information that can be extracted from DAC experiments is often limited by the material and geometric constraints of the pressure device itself — the sample is surrounded by millimeters of diamond and inches of steel. Solid-state high harmonic generation spectroscopy (sHHG) is an emerging technique for studying electronic and structural properties of materials which uses ultrafast lasers to excite electrons and optical spectroscopy to probe them, thus providing an all-optical avenue to gleaning detailed electronic information on materials at extreme pressure. This NSF EPSCoR RII Track-4 research project combines high-pressure expertise from the University of Nevada, Las Vegas (UNLV) with world-leading ultrafast spectroscopy capabilities at the University of California, Berkeley (UCB) to deliver a method to measure electronic band structures of materials at extreme pressures directly. The resulting new methodology will provide researchers with a means to directly measure properties materials at high pressure which are currently inferred from accompanying computation, and the project will also expose UNLV students to cutting-edge techniques at a world-leading institution.This NSF EPSCoR Research Infrastructure Improvement Track-4 Research Fellows (RII Track-4) project provides a fellowship to a Research Assistant Professor at UNLV at a critical juncture of their academic career, and support for a graduate student to participate in first-of-their-kind experiments. The focus of this project is the application of solid-state high harmonic generation spectroscopy to materials at extreme high pressures in a diamond anvil cell. The results can be used to construct their electronic band structures — information which is not possible to garner using currently available experimental methodologies. A development of this kind will thus fill a longstanding gap in high-pressure research, and the PI and the host will be poised to apply their new technique to a range of problems, which involve tracking pressure-induced electronic phase transitions and chemical reactions in situ at high pressures. The PI and students will have access to unique and world-leading facilities at the host institution and will aid in further developing those facilities for compatibility with high-pressure experiments. The fellowship will foster a strong tie between UCB and UNLV, a Minority-Serving Institution, Title III Asian American and Native American, Pacific Islander-Serving Institution, and a Title V Hispanic-Serving Institution. This will prove transformative to the career of the junior PI, and to the research infrastructure at UNLV owing to the new expertise which will be made present on its campus.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.

钻石砧细胞是在极端压力（数千至数百万个气氛）下探测材料的强大工具，但是可以从DAC实验中提取的电子信息通常受压力装置本身的材料和几何约束限制 - 样品被钻石和钢的毫米毫米包围。固态高谐波生成光谱（SHHG）是一种用于研究材料的电子和结构性能的新兴技术，该技术使用超快激光器来激发电子和光谱光谱探测它们，从而为极端压力上的材料上收集详细的电子信息，从而提供全光途径。该NSF EPSCOR RII TRECT-4研究项目结合了内华达大学拉斯维加斯大学（UNLV）的高压专业知识，并在加利福尼亚大学伯克利分校（UCB）的世界领先的超快光谱能力和世界领先的超快光谱能力中提供了一种直接在极端压力的材料电子带结构的方法。 The resulting new methodology will provide researchers with a means to directly measure properties materials at high pressure which are currently inferred from participating computation, and the project will also expose UNLV students to cutting-edge techniques at a world-leading institution.This NSF EPSCoR Research Infrastructure Improvement Track-4 Research Fellows (RII Track-4) project provides a fellowship to a Research Assistant Professor at UNLV at a critical juncture of their academic career, and support for一名研究生参加第一届实验实验。该项目的重点是将固态高谐波生成光谱应用于钻石砧细胞中极高压力的材料。结果可用于构建其电子带结构 - 使用当前可用的实验方法无法获得的信息。因此，这种发展将填补高压研究中的长期差距，PI和宿主将被毒化，将其新技术应用于一系列问题，其中涉及跟踪压力诱导的电子相变和高压的原位化学反应。 PI和学生将可以在主机机构获得独特而世界领先的设施，并有助于进一步开发这些设施，以与高压实验兼容。该奖学金将促进UCB和UNLV，少数派服务机构，第三次亚裔美国人和美洲原住民，太平洋岛民服务机构的牢固关系，以及标题为v西班牙裔服务机构。由于新的专业知识将在其校园中提出的新专业知识，这将证明对初级PI的职业以及UNLV的研究基础设施的变革性。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响审查标准来通过评估来诚实地认为通过评估来诚实地支持。