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Physics Seminar Date: Thursday, 4 July 2024 Time: 11:45 AM Venue: Seminar Hall Emergent Properties in Quantum Materials: Inverse Faraday effect and Orbital Magnetization Saikat Banerjee Rutgers, The State University of New Jersey. 04-07-24 Abstract In this talk, I will briefly describe my major research activities in strongly correlated quantum materials. After introducing the broad idea of emergence in a many-body physics framework and outlining the key questions I am working on, I will focus on two characteristic examples based on my previous works [Refs. 1,2]. In the first part, I will try to introduce the concept of Inverse Faraday effect (IFE) and then lay out the microscopic origin of IFE in two classes of Mott insulators --- centrosymmetric and non-centrosymmetric. Most importantly, the emergence of antiferromagnetic IFE in non-centrosymmetric Mott insulators will be emphasized. To the best of our knowledge, the latter framework is developed for the first time in our work [Ref. 1]. In the latter part, I will summarize the emergence of orbital magnetization in a particular class of multiorbital Mott insulators that lack any magnetic ordering and form a prototypical example of quantum spin liquids [Ref. 2]. The talk will end with a discussion of some of my future plans, briefly mentioning multipolar multiferroics in spin-orbit coupled multiorbital Mott insulators and other related physics in the framework of coupled spin-orbital-charge-lattice degrees of freedom in correlated quantum materials. 1. Inverse Faraday effect in Mott insulators, S. Banerjee, U. Kumar, and S.-Z. Lin; Phys. Rev. B 105, L180414 (2022) [Letter] 2. Emergent orbital magnetization in Kitaev quantum magnets, S. Banerjee, and S.-Z. Lin; SciPost Phys. 14, 127 (2023) 3. Multipolar multiferroics in 4d^2/5d^2 Mott insulators S. Banerjee, S. Humeniuk, A.R. Bishop, A. Saxena, and A.V. Balatsky (manuscript available upon request)
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