[GS_C_QT] Emergent Magnetism and Correlation in Complex Materials: A First-Principles Perspective
ABSTRACT
Novel magnetic materials can exhibit the strong correlation of electrons as the localized magnetic moments are strongly coupled with the neighboring structural, electronic, and magnetic degrees of freedom. These strongly correlated magnetic materials are promising candidates for future quantum devices due to their tunability under strain, pressure, and chemical dopings. First-principles studies of such materials have been challenging since the widely used density functional theory method often fails to capture the strong correlation effect in materials. In this talk, I will demonstrate that the advanced dynamical mean field theory (DMFT) method can be successfully applied to the design and understanding of such novel properties of strongly correlated materials. In this regard, I will discuss the orbital-selective Mott state and the possible tuning of electronic structure in Na3Co2SbO6 under strain and pressure, which has been suggested as a possible candidate to realize the Kitaev spin liquid phase. I will also discuss our recent implementation of the DMFT code for computing magnetic exchange interactions and its possible application to the correlated magnetic materials.
Bio
Hyowon Park is an Associate Professor of Physics at University of Illinois at Chicago, and a joint Scientist at Argonne National Laboratory. He earned his Ph.D from Rutgers University in 2011 and was a post-doc researcher at Columbia University. He was a recipient of the Outstanding Young Researcher Award (2019) from the Association of Korean Physicists in America. His research focuses on studying various novel properties of strongly correlated materials using advanced computational and first-principles methods.
