Date/Time Date(s) - 31/01/20252:30 pm - 3:30 pm
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Dr. Bo Yuan
NSERC postdoctoral fellow, Dept. of Physics and Astronomy, McMaster University
Abstract: 4d and 5d materials with strong spin-orbit coupling (SOC) have been intensively studied for more than a decade for potential SOC-induced exotic electronic and magnetic phases. Throughout the study of 5d materials such as the iridates, resonant inelastic X-ray scattering (RIXS), which probes the ‘optically dark’ dd-transitions, has played a pivotal role in understanding their underlying physics by directly determining various fundamental microscopic energy scales such as the SOC, crystal-field energy and Hund’s coupling. In stark contrast, similar studies in 4d materials have been very rare and become possible only recently with the advancement of Ru L-edge and M-edge RIXS spectroscopy. In this talk, I will present our recent work on two classes of 4d materials, 4d4 double perovskite, and Ru-dimers with a triple perovskite structure, using RIXS at the Ru-M3 edge. I will highlight the key differences between these 4d systems and their 5d counterparts and discuss how insights gained from RIXS directly translate to a microscopic understanding of their bulk properties.
Bio: Bo Yuan is currently an NSERC postdoctoral fellow working directly with Bruce Gaulin and Pat Clancy. His research focusses on understanding the microscopic magnetic interactions in a broad range of quantum materials using a variety of diffraction/spectroscopy techniques based on X-ray and neutrons. In addition to his research in quantum materials, he is also a part of the neutron instrument development team at the McMaster university. He is currently the instrument scientist on the McMaster Alignment Diffractometer (MAD) at the McMaster Nuclear Reactor, responsible for conducting instrument upgrades and running user experiment on MAD.
He carried out his doctoral work at University of Toronto with Prof. Young-June Kim where he carried neutron and X-ray scattering study of a broad range of quantum magnets. Before joining McMaster, he did a 1-year postdoc at the Max Planck Insitute for Structure and Dynamics of Matter at Hamburg with Prof. Andrea Cavalleri, where he carried out pump probe experiments to study the non-equilibrium properties of quantum materials under intense laser field.
In-Person: ABB 102
Online: https://mcmaster.zoom.us/j/92354924792
Meeting ID: 923 5492 4792 Passcode: 338645