A Tale of Two Singularities — fundamental and energy applications on topological Weyl materials
Friday, October 02, 2020 at 1:00pm to 2:00pmVirtual Event
Please join us for a jointly hosted seminar between the NSE department and the MIT Alumni Association as detailed below.
Speaker: Prof. Mingda Li, Nuclear Science and Engineering, MIT
Abstract: Topological materials contain robust electronic states against perturbation, leading to exotic fundamental properties and promising applications such as dissipationless electronics and fault-tolerant quantum computations. For a particular type of topological material, the Weyl semimetal (WSM), topology is manifested as a pair of topological singularities like momentum-space magnetic monopoles. In this seminar, after a brief introduction on topology and its link to real life and quantum materials, I will introduce our recent research on these paired singularities in a WSM. In one example, we show that how the topological singularities enable the visualization of electronic topology through ionic degrees of freedom called Kohn anomaly ; while in another example, we show that how the singularities can be used to break the barrier of thermoelectric power factor by order-of-magnitudes . We conclude by showing a broader phenomena and applications enabled by the topological singularity in a WSM.