Anomalous behavior of nonequilibrium excitations in
Abstract
Ultrafast optical pump-probe studies of uranium dioxide (UO2) under pressure were performed in order to better understand the material's response to ionizing radiation. Photoexcitation generates oscillations in the time-resolved reflectivity at two distinct GHz-scale frequencies. The higher-frequency mode is attributed to a coherent longitudinal acoustic mode. The lower-frequency mode does not correspond to any known excitation under equilibrium conditions. The frequency and lifetime of the low-frequency mode are studied as a function of pressure. Abrupt changes in the pressure-dependent slopes of these attributes are observed at ~10 GPa, which correlates with an electronic transition in UO2. Variation of probe wavelength reveals that the low-k dispersion of the low-frequency mode does not fit into either an optical or acoustic framework. Rather, we propose that this mode is related to the dynamical magnetic structure of UO2. As a result, the implications of these results help account for the anomalously small volume of damage known to be caused by ionizing radiation in UO2; we propose that the existence of the low-frequency mode enhances the material's transient thermal conductivity, while its long lifetime lengthens the timescale over which energy is dissipated. Both mechanisms enhance damage recovery.
- Authors:
-
- Stanford Univ., Stanford, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Materials Science of Actinides (MSA); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1526441
- Alternate Identifier(s):
- OSTI ID: 1508184
- Grant/Contract Number:
- SC0001089; AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 13; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Rittman, Dylan R., Teitelbaum, Samuel W., Reis, David A., Mao, Wendy L., and Ewing, Rodney C. Anomalous behavior of nonequilibrium excitations in UO2. United States: N. p., 2019.
Web. doi:10.1103/physrevb.99.134307.
Rittman, Dylan R., Teitelbaum, Samuel W., Reis, David A., Mao, Wendy L., & Ewing, Rodney C. Anomalous behavior of nonequilibrium excitations in UO2. United States. https://doi.org/10.1103/physrevb.99.134307
Rittman, Dylan R., Teitelbaum, Samuel W., Reis, David A., Mao, Wendy L., and Ewing, Rodney C. Mon .
"Anomalous behavior of nonequilibrium excitations in UO2". United States. https://doi.org/10.1103/physrevb.99.134307. https://www.osti.gov/servlets/purl/1526441.
@article{osti_1526441,
title = {Anomalous behavior of nonequilibrium excitations in UO2},
author = {Rittman, Dylan R. and Teitelbaum, Samuel W. and Reis, David A. and Mao, Wendy L. and Ewing, Rodney C.},
abstractNote = {Ultrafast optical pump-probe studies of uranium dioxide (UO2) under pressure were performed in order to better understand the material's response to ionizing radiation. Photoexcitation generates oscillations in the time-resolved reflectivity at two distinct GHz-scale frequencies. The higher-frequency mode is attributed to a coherent longitudinal acoustic mode. The lower-frequency mode does not correspond to any known excitation under equilibrium conditions. The frequency and lifetime of the low-frequency mode are studied as a function of pressure. Abrupt changes in the pressure-dependent slopes of these attributes are observed at ~10 GPa, which correlates with an electronic transition in UO2. Variation of probe wavelength reveals that the low-k dispersion of the low-frequency mode does not fit into either an optical or acoustic framework. Rather, we propose that this mode is related to the dynamical magnetic structure of UO2. As a result, the implications of these results help account for the anomalously small volume of damage known to be caused by ionizing radiation in UO2; we propose that the existence of the low-frequency mode enhances the material's transient thermal conductivity, while its long lifetime lengthens the timescale over which energy is dissipated. Both mechanisms enhance damage recovery.},
doi = {10.1103/physrevb.99.134307},
journal = {Physical Review B},
number = 13,
volume = 99,
place = {United States},
year = {Mon Apr 22 00:00:00 EDT 2019},
month = {Mon Apr 22 00:00:00 EDT 2019}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Ultrafast Hopping Dynamics of Electrons in the Mott Insulator Studied by Femtosecond Pump-Probe Spectroscopy
journal, May 2011
- An, Yong Q.; Taylor, Antoinette J.; Conradson, Steven D.
- Physical Review Letters, Vol. 106, Issue 20
Femtosecond dynamics of exciton localization: self-trapping from the small to the large polaron limit
journal, March 2013
- Morrissey, F. X.; Mance, J. G.; Van Pelt, A. D.
- Journal of Physics: Condensed Matter, Vol. 25, Issue 14
Phonon spectrum, thermodynamic properties, and pressure-temperature phase diagram of uranium dioxide
journal, September 2013
- Wang, Bao-Tian; Zhang, Ping; Lizárraga, Raquel
- Physical Review B, Vol. 88, Issue 10
Possible Demonstration of a Polaronic Bose-Einstein(-Mott) Condensate in UO2(+x) by Ultrafast THz Spectroscopy and Microwave Dissipation
journal, October 2015
- Conradson, Steven D.; Gilbertson, Steven M.; Daifuku, Stephanie L.
- Scientific Reports, Vol. 5, Issue 1
Electron dynamics and energy dissipation in highly excited dielectrics
journal, May 2014
- Rethfeld, B.; Rämer, A.; Brouwer, N.
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 327
Optical properties and electronic structure of UO 2
journal, March 1978
- Schoenes, J.
- Journal of Applied Physics, Vol. 49, Issue 3
Generation and detection of coherent longitudinal acoustic phonons in the La0.67Sr0.33MnO3 thin films by femtosecond light pulses
journal, June 2007
- Ren, Y. H.; Trigo, M.; Merlin, R.
- Applied Physics Letters, Vol. 90, Issue 25
Detection of Coherent Magnons via Ultrafast Pump-Probe Reflectance Spectroscopy in Multiferroic
journal, August 2008
- Talbayev, D.; Trugman, S. A.; Balatsky, A. V.
- Physical Review Letters, Vol. 101, Issue 9
Modelling the effects of electronic excitations in ionic-covalent materials
journal, April 2012
- Duffy, D. M.; Daraszewicz, S. L.; Mulroue, J.
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 277
Phase transformation pathways of ultrafast-laser-irradiated
journal, January 2018
- Rittman, Dylan R.; Tracy, Cameron L.; Chen, Chien-Hung
- Physical Review B, Vol. 97, Issue 2
Nanoscale phase transitions under extreme conditions within an ion track
journal, July 2010
- Zhang, Jiaming; Lang, Maik; Ewing, Rodney C.
- Journal of Materials Research, Vol. 25, Issue 7
Photoinduced coherent acoustic phonon dynamics inside Mott insulator Sr 2 IrO 4 films observed by femtosecond X-ray pulses
journal, April 2017
- Zhang, Bing-Bing; Liu, Jian; Wei, Xu
- Applied Physics Letters, Vol. 110, Issue 15
Electronic stopping power dependence of ion-track size in UO2 irradiated with heavy ions in the energy range of ∼1MeV/u
journal, November 2013
- Ishikawa, N.; Sonoda, T.; Sawabe, T.
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 314
High-pressure optical studies of uranium compounds
journal, December 1986
- Syassen, K.; Winzen, H.; Benedict, U.
- Physica B+C, Vol. 144, Issue 1
Ultrafast Photoemission Spectroscopy of the Uranium Dioxide Mott Insulator: Evidence for a Robust Energy Gap Structure
journal, February 2014
- Gilbertson, Steve M.; Durakiewicz, Tomasz; Dakovski, Georgi L.
- Physical Review Letters, Vol. 112, Issue 8
Fission-fragment spikes in uranium dioxide
journal, November 2002
- Ronchi, C.; Wiss, T.
- Journal of Applied Physics, Vol. 92, Issue 10
Dense and nanometric electronic excitations induced by swift heavy ions in an ionic CaF crystal: Evidence for two thresholds of damage creation
journal, February 2012
- Toulemonde, M.; Benyagoub, A.; Trautmann, C.
- Physical Review B, Vol. 85, Issue 5
Structure and bulk modulus of Ln-doped UO2 (Ln = La, Nd) at high pressure
journal, July 2017
- Rittman, Dylan R.; Park, Sulgiye; Tracy, Cameron L.
- Journal of Nuclear Materials, Vol. 490
Evidence of extended defects in pure zirconia irradiated by swift heavy ions
journal, October 2006
- Baldinozzi, Gianguido; Simeone, David; Gosset, Dominique
- Physical Review B, Vol. 74, Issue 13
Phase transformations in materials irradiated with swift heavy ions
journal, November 2015
- Tracy, Cameron L.; Lang, Maik; Zhang, Fuxiang
- Physical Review B, Vol. 92, Issue 17
Hydrostatic limits of 11 pressure transmitting media
journal, March 2009
- Klotz, S.; Chervin, J-C.; Munsch, P.
- Journal of Physics D: Applied Physics, Vol. 42, Issue 7, Article No. 075413
Phonon Lifetime Investigation of Anharmonicity and Thermal Conductivity of by Neutron Scattering and Theory
journal, April 2013
- Pang, Judy W. L.; Buyers, William J. L.; Chernatynskiy, Aleksandr
- Physical Review Letters, Vol. 110, Issue 15
Possible Bose-condensate behavior in a quantum phase originating in a collective excitation in the chemically and optically doped Mott-Hubbard system UO
journal, September 2013
- Conradson, Steven D.; Durakiewicz, Tomasz; Espinosa-Faller, Francisco J.
- Physical Review B, Vol. 88, Issue 11
Elastic constants, phonon density of states, and thermal properties of UO
journal, July 2011
- Sanati, M.; Albers, R. C.; Lookman, T.
- Physical Review B, Vol. 84, Issue 1
Ultrasonic velocity in sintered uranium dioxide pellets
journal, September 1984
- Panakkal, J. P.; Ghosh, J. K.
- Journal of Materials Science Letters, Vol. 3, Issue 9
Is UO2 irradiation resistance due to its unusual high temperature behaviour?
journal, January 2012
- Desgranges, L.; Baldinozzi, G.; Ruello, P.
- Journal of Nuclear Materials, Vol. 420, Issue 1-3
Making tracks: electronic excitation roles in forming swift heavy ion tracks
journal, November 2009
- Itoh, N.; Duffy, D. M.; Khakshouri, S.
- Journal of Physics: Condensed Matter, Vol. 21, Issue 47
Core electron excitations in U 4+ : modelling of the nd 10 5f 2 → nd 9 5f 3 transitions with n = 3, 4 and 5 by ligand field tools and density functional theory
journal, January 2016
- Ramanantoanina, Harry; Kuri, Goutam; Daul, Claude
- Physical Chemistry Chemical Physics, Vol. 18, Issue 28
A combined theoretical and experimental investigation of uranium dioxide under high static pressure
journal, June 2015
- Crowhurst, J. C.; Jeffries, J. R.; Åberg, D.
- Journal of Physics: Condensed Matter, Vol. 27, Issue 26
Transient thermal process after a high-energy heavy-ion irradiation of amorphous metals and semiconductors
journal, December 1992
- Toulemonde, M.; Dufour, C.; Paumier, E.
- Physical Review B, Vol. 46, Issue 22
Ultrafast laser and swift heavy ion irradiation: Response of Gd 2 O 3 and ZrO 2 to intense electronic excitation
journal, April 2015
- Rittman, Dylan R.; Tracy, Cameron L.; Cusick, Alex B.
- Applied Physics Letters, Vol. 106, Issue 17
Closure of the Mott gap and formation of a superthermal metal in the Fröhlich-type nonequilibrium polaron Bose-Einstein condensate in
journal, September 2017
- Conradson, Steven D.; Andersson, David A.; Boland, Kevin S.
- Physical Review B, Vol. 96, Issue 12
Structural and physical properties of actinide materials at high pressure
journal, October 1994
- Benedict, U.
- Journal of Alloys and Compounds, Vol. 213-214
- origin of the insulating state in uranium dioxide: X-ray absorption experiments and first-principles calculations
journal, April 2011
- Yu, S. -W.; Tobin, J. G.; Crowhurst, J. C.
- Physical Review B, Vol. 83, Issue 16
New insight on the high radiation resistance of UO 2 against fission fragments
journal, December 2016
- Szenes, G.
- Journal of Nuclear Materials, Vol. 482
The Crystal Dynamics of Uranium Dioxide
journal, August 1965
- Dolling, G.; Cowley, R. A.; Woods, A. D. B.
- Canadian Journal of Physics, Vol. 43, Issue 8
Clarification of high density electronic excitation effects on the microstructural evolution in UO2
journal, October 2010
- Sonoda, T.; Kinoshita, M.; Ishikawa, N.
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 19
Magnetic excitations and dynamical Jahn-Teller distortions in
journal, June 1999
- Caciuffo, R.; Amoretti, G.; Santini, P.
- Physical Review B, Vol. 59, Issue 21
General features of latent track formation in magnetic insulators irradiated with swift heavy ions
journal, April 1995
- Szenes, G.
- Physical Review B, Vol. 51, Issue 13
Coherent magnon and acoustic phonon dynamics in tetragonal and rare-earth-doped BiFeO multiferroic thin films
journal, September 2013
- Doig, K. I.; Aguesse, F.; Axelsson, A. K.
- Physical Review B, Vol. 88, Issue 9
Visible and Ultraviolet Absorption Properties of Uranium Dioxide Films*
journal, January 1959
- Ackermann, R. J.; Thorn, R. J.; Winslow, G. H.
- Journal of the Optical Society of America, Vol. 49, Issue 11