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

量子材料科学专注于在宏观长度尺度上表现出量子力学效应的材料的新方面。量子材料与经典材料的不同之处在于能够探测、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的保护伞，其中一个最好的例子是半导体量子点。在纳米级半导体中，人们可以看到量子效应对单个粒子以及它们组装成宏观超结构的影响。这些效应通常使用基于简单一维光谱的经典凝聚态物理来描述。在我们的团队中，我们开创了二维电子光谱(2DE)的新方法，使人们能够前所未有地观察材料中的电子和结构动力学。这些2DE结果使量子点中电子结构和动力学的许多主流理论受到了质疑。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。在我们最初的一维和二维超快光谱实验之后，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实验与理论相结合，以指导实验解释并帮助开发新的实验。这一合作的影响将是推动Kambhampati集团作为量子点电子结构和动态领域的世界领先者的地位。科学的影响将是在我们理解和探索量子材料科学的规范系统之一的方式上产生一次真正的颠覆性转变。这一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的科学，并为HQP提供增值培训。

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.