Determination of the electron-lattice coupling strength of copper with ultrafast MeV electron diffraction
Abstract
Electron-lattice coupling strength governs the energy transfer between electrons and the lattice and is important for understanding the material behavior under highly non-equilibrium conditions. We report the results of employing time-resolved electron diffraction at MeV energies to directly study the electron-lattice coupling strength in 40-nm-thick polycrystalline copper excited by femtosecond optical lasers. The temporal evolution of lattice temperature at various pump fluence conditions were obtained from the measurements of the Debye-Waller decay of multiple diffraction peaks. We observed the temperature dependence of the electron-lattice relaxation time which is a result of the temperature dependence of electron heat capacity. Comparison with two-temperature model simulations reveals an electron-lattice coupling strength of (0.9 ± 0.1) × 1017 W/m3/K for copper.
- Authors:
-
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Southern Illinois Univ., Edwardsville, IL (United States). Dept. of Physics
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Rostock (Germany). Inst. of Physics
- Univ. of Rostock (Germany). Inst. of Physics
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Rostock (Germany)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES); German Research Foundation (DFG)
- OSTI Identifier:
- 1490446
- Alternate Identifier(s):
- OSTI ID: 1471442
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; polycrystalline material; ultrafast lasers; thermodynamic properties; electron diffraction
Citation Formats
Mo, M. Z., Becker, V., Ofori-Okai, B. K., Shen, X., Chen, Z., Witte, B., Redmer, R., Li, R. K., Dunning, M., Weathersby, S. P., Wang, X. J., and Glenzer, S. H. Determination of the electron-lattice coupling strength of copper with ultrafast MeV electron diffraction. United States: N. p., 2018.
Web. doi:10.1063/1.5035368.
Mo, M. Z., Becker, V., Ofori-Okai, B. K., Shen, X., Chen, Z., Witte, B., Redmer, R., Li, R. K., Dunning, M., Weathersby, S. P., Wang, X. J., & Glenzer, S. H. Determination of the electron-lattice coupling strength of copper with ultrafast MeV electron diffraction. United States. https://doi.org/10.1063/1.5035368
Mo, M. Z., Becker, V., Ofori-Okai, B. K., Shen, X., Chen, Z., Witte, B., Redmer, R., Li, R. K., Dunning, M., Weathersby, S. P., Wang, X. J., and Glenzer, S. H. Wed .
"Determination of the electron-lattice coupling strength of copper with ultrafast MeV electron diffraction". United States. https://doi.org/10.1063/1.5035368. https://www.osti.gov/servlets/purl/1490446.
@article{osti_1490446,
title = {Determination of the electron-lattice coupling strength of copper with ultrafast MeV electron diffraction},
author = {Mo, M. Z. and Becker, V. and Ofori-Okai, B. K. and Shen, X. and Chen, Z. and Witte, B. and Redmer, R. and Li, R. K. and Dunning, M. and Weathersby, S. P. and Wang, X. J. and Glenzer, S. H.},
abstractNote = {Electron-lattice coupling strength governs the energy transfer between electrons and the lattice and is important for understanding the material behavior under highly non-equilibrium conditions. We report the results of employing time-resolved electron diffraction at MeV energies to directly study the electron-lattice coupling strength in 40-nm-thick polycrystalline copper excited by femtosecond optical lasers. The temporal evolution of lattice temperature at various pump fluence conditions were obtained from the measurements of the Debye-Waller decay of multiple diffraction peaks. We observed the temperature dependence of the electron-lattice relaxation time which is a result of the temperature dependence of electron heat capacity. Comparison with two-temperature model simulations reveals an electron-lattice coupling strength of (0.9 ± 0.1) × 1017 W/m3/K for copper.},
doi = {10.1063/1.5035368},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {Wed Sep 19 00:00:00 EDT 2018},
month = {Wed Sep 19 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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Figures / Tables found in this record: