Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session K38: Light Induced Structural Control of Electronic Phases II
3:00 PM–6:00 PM,
Tuesday, March 7, 2023
Room: Room 230
Sponsoring
Unit:
DMP
Chair: Daniele Fausti, Elettra Sincrotrone Trieste
Abstract: K38.00011 : Evidence for inhomogeneous and percolative dynamics across the photo-induced insulator-metal phase transition in Ca3Ru2O7*
5:24 PM–5:36 PM
Presenter:
James Tyler Carbin
(University of California, Los Angeles)
Author:
James Tyler Carbin
(University of California, Los Angeles)
tion through a non-equilibrium pathway, but understanding these pathways remains an outstanding
challenge. Here, we use time-resolved second harmonic generation to investigate a photo-induced
insulator-metal transition in Ca3Ru2O7 and show that mesoscale inhomogeneity profoundly influ-
ences the transition dynamics. We observe a marked slowing down of the characteristic time, τ , that
quantifies the transition from the insulating to the metallic state. τ evolves non-monotonically as a
function of photo-excitation fluence, first increasing from below 200 fs to ∼1.4 ps, and then decreas-
ing to below 200 fs. To account for the experimentally observed behavior, we perform a simulation
using a statistical model that demonstrates how the percolation and coarsening of metallic clusters
governs the transition kinetics. Our work highlights the importance of mesoscale inhomogeneity in
the dynamics of photo-induced insulator-metal phase transitions and provides a model that may be
useful for understanding such transitions more broadly.
*This work was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences under Award No. DE-SC0023017
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