Effects of Orbital-Selective Mott Phase on Electronic Structures in Iron Chalcogenide Superconductors
Abstract: Multiorbital systems with strong electron correlations often exhibit an orbital-selective Mott phase (OSMP), where one orbital is effectively localized while the others remain in a metallic state. Despite high interest in the OSMP, studies on its role in electronic structures remain elusive. In this seminar, I will introduce how the OSMP affects the electronic structures in iron chalcogenides, a prototypical OSMP system. Laser-based high-resolution ARPES results reveal that the OSMP can induce heavy fermionic behavior and topological phase transition [1]. These results show that OSMP plays a significant role in the electronic structures in the strongly correlated regime.
[1] Y. Kim et al., Nat. Commun. 14, 4145 (2023).
About the QSQM: The EFRC-QSQM center aims to develop and apply nontrivial quantum sensing to measure and correlate local and nonlocal quantum observables in exotic superconductors, topological crystalline insulators, and strange metals. The center is led by the University of Illinois at Urbana-Champaign in partnership with the University of Illinois at Chicago and the SLAC National Accelerator Laboratory.