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Theme 3 colloquium by Prof. Mazhar Ali (Kavli Institute of Nanoscience, Delft University of Technology) : Kagome Quantum Materials: A combination of correlation, topology, and magnetism' (Lecture)

Tuesday 31 May 2022Add to my calendar
from 16:00
Prof. Mazhar Ali (Kavli Institute of Nanoscience, Delft University of Technology)

So-called "Kagome" materials are those which host a 2D Kagome net, or trihexagonal tiling, in their crystal structure. Kagome nets are formed from corner-sharing  triangles of atoms and is known for multiple traits: topological band structures including Dirac points, strong correlation arising from flat bands and van Hove singularities, and geometric frustration resulting in complex magnetism. In this platform, which often includes 2D layered compounds, many exotic behaviors have and are being studied such as topological semimetal behavior, unconventional superconductivity, and possible quantum spin liquid states. In this talk, we will discuss the recently uncovered Kagome metals (where transition metals comprise the Kagome net) where it has been shown that the interplay of the three traits from the Kagome net has lead to the simultaneous existence of nematic superconductivity, topological surface states, and magnetically  driven behavior like a giant extrinsic Anomalous Hall effect. The material families which have been realized, open questions, and future material directions will also be discussed.

prof. Alex Khajetoorians