1. Nonthermal Bonding Origin of a Novel Photoexcited Lattice Instability in SnSe.
- Author
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Huang Y, Teitelbaum S, Yang S, De la Peña G, Sato T, Chollet M, Zhu D, Niedziela JL, Bansal D, May AF, Lindenberg AM, Delaire O, Trigo M, and Reis DA
- Abstract
Lattice dynamics measurements are often crucial tools for understanding how materials transform between different structures. We report time-resolved x-ray scattering-based measurements of the nonequilibrium lattice dynamics in SnSe, a monochalcogenide reported to host a novel photoinduced lattice instability. By fitting interatomic force models to the fluence dependent excited-state dispersion, we determine the nonthermal origin of the lattice instability to be dominated by changes of interatomic interactions along a bilayer-connecting bond, rather than of an intralayer bonding network that is of primary importance to the lattice instability in thermal equilibrium.
- Published
- 2023
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