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Dirac Electrons in Kagome Lattice Materials

Date : Thursday, February 14th, 2019 14:00 - 15:00 Place : Seminar Room 5 (A615), 6th Floor, ISSP Lecturer : Prof. Joseph Checkelsky Affiliation : Massachusetts Institute of Technology (MIT) Department of Physics Committee Chair : Natalia Drichko (63357)
e-mail: drichko@jhu.edu

The kagome lattice is a two-dimensional network of corner-sharing triangles known as a platform for exotic quantum magnetic states. Theoretical work has predicted that the kagome lattice may also host exotic Dirac electronic states including those with non-trivial topology.  We here present our recent work in conducting, layered kagome materials exploring these Dirac-like states, particularly in systems with magnetic order.  We describe observations of massive Dirac states and associated Berry curvature induced transport.  We also demonstrate the detection of these states from de Haas-van Alphen oscillations and their modification in magnetic field.  Finally, we discuss the promise for these materials in terms of realizing robust time-reversal-breaking topological phases.

(Published on: Thursday January 31st, 2019)