Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session E63: New Developments in FQHE and Light-induced electronic phases
8:00 AM–9:48 AM,
Tuesday, March 16, 2021
Sponsoring Unit: DCMP
Chair: Dominik Juraschek, Harvard University
Abstract: E63.00001 : Ultrafast optical control of complex oxide functional properties: New insights from theory and first-principles calculations*
8:00 AM–8:36 AM
In this talk, I will describe our recent theoretical efforts exploring ultrafast optical control of the functional properties of perovskite oxides. I will focus on two examples in particular: dynamical stabilization of a non-equilibrium magnetic phase in GdTiO3, and transient switching of ferroelastic domains in LaAlO3 under realistic experimental conditions. Our work highlights the importance of understanding the contributions of small structural distortions to the optical response in perovskites (in contrast with large-amplitude distortions, such as octahedral rotations), and illustrates how, in experiments involving intense resonant excitation of infrared active modes, considering nonlinear contributions to the lattice polarizability can open new pathways to structural control.
*DOE: DE-SC0019414 NSF: DMR-1719875
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