Nonthermal Bonding Origin of a Novel Photoexcited Lattice Instability in SnSe
Journal Article
·
· Physical Review Letters
- University of Illinois at Urbana-Champaign, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford PULSE Institute
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford PULSE Institute; Arizona State University, Tempe, AZ (United States)
- Duke University, Durham, NC (United States)
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford PULSE Institute
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
- Duke University, Durham, NC (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Duke University, Durham, NC (United States); Indian Institute of Technology Bombay, Mumbai (India)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford PULSE Institute; Stanford University, CA (United States)
Lattice dynamics measurements are often crucial tools for understanding how materials transform between different structures. Here, 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.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Fitzpatrick Institute for Photonics
- Grant/Contract Number:
- AC02-76SF00515; SC0019978; AC05-00OR22725
- OSTI ID:
- 2223107
- Alternate ID(s):
- OSTI ID: 2203803
- Journal Information:
- Physical Review Letters, Vol. 131, Issue 15; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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