Unraveling atomistic effects in quantum materials via advanced experiment and theory in collaboration

通过先进的实验和理论合作揭示量子材料中的原子效应

• 批准号: 575563-2022
• 负责人: Kambhampati, PatanjaliP
• 金额: $ 1.82万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=747465
• 关键词: Unraveling; atomistic; effects; quantum; materials

Quantum materials science focuses on new aspects of materials that exhibit quantum mechanical effects on macroscopic length scales. What distinguishes quantum materials from classical materials is the ability to probe, control, and exploit these quantum effects. There are many classes of materials that fall under the umbrella of quantum materials, of which a prime example is the semiconductor quantum dot. In nanoscale semiconductors, one sees quantum effects on individual particles as well as in their assembly into macroscopic superstructures. These effects are generally described using classical condensed matter physics based upon simple one-dimensional spectroscopies. In our group we have pioneered new methods in Two-Dimensional Electronic Spectroscopy (2DE) which enables unprecedented access to observing electronic and structural dynamics in materials. These 2DE results have called into question many of the prevailing theories of electronic structure and dynamics in quantum dots. What is missing is a way to connect the far richer 2DE results with state-of-the-art theory. Following our initial 1D and 2D ultrafast spectroscopic experiments, we will collaborate with Professor Eran Rabani (University of California at Berkeley) on combining world leading 2DE experiments with theory to guide interpretation of experiments and help develop new experiments. The impact of this collaboration will be to advance the position of the Kambhampati group as world leaders in the electronic structure and dynamic of quantum dots. The scientific impact will be to produce a truly disruptive transition in how we understand and probe one of the canonical systems of quantum materials science. This collaboration will strengthen Canadian international research networks and bring new science to Canadian researchers and provide value added training to HQP.

量子材料科学关注材料在宏观长度尺度上表现出量子力学效应的新方面。量子材料与经典材料的区别在于能够探测、控制和利用这些量子效应。有许多种类的材料属于量子材料，其中一个主要的例子是半导体量子点。在纳米级半导体中，我们可以看到单个粒子的量子效应，以及它们组装成宏观上层结构的量子效应。这些效应通常是用基于简单一维光谱的经典凝聚态物理来描述的。在我们的团队中，我们开创了二维电子光谱（2DE）的新方法，这使得前所未有地可以观察材料中的电子和结构动力学。这些2DE结果对量子点中电子结构和动力学的许多流行理论提出了质疑。现在缺少的是一种将更丰富的2DE结果与最先进的理论联系起来的方法。在我们最初的1D和2D超快光谱实验之后，我们将与加州大学伯克利分校的Eran Rabani教授合作，将世界领先的2DE实验与理论结合起来，指导实验的解释并帮助开发新的实验。这次合作的影响将是提升Kambhampati小组在量子点电子结构和动态方面的世界领先地位。科学影响将产生一个真正颠覆性的转变，我们如何理解和探索量子材料科学的一个规范系统。这项合作将加强加拿大的国际研究网络，为加拿大研究人员带来新科学，并为HQP提供增值培训。