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Title: Observation of photo-induced plasmon–phonon coupling in PbTe via ultrafast x-ray scattering

Abstract

We report the observation of photo-induced plasmon–phonon coupled modes in the group IV–VI semiconductor PbTe using ultrafast x-ray diffuse scattering at the Linac Coherent Light Source. We measure the near-zone-center excited-state dispersion of the heavily screened longitudinal optical (LO) phonon branch as extracted from differential changes in x-ray diffuse scattering intensity following above bandgap photoexcitation. We suggest that upon photoexcitation, the LO phonon-plasmon coupled (LOPC) modes themselves become coupled to longitudinal acoustic modes that drive electron band shifts via acoustic deformation potentials and possibly to low-energy single-particle excitations within the plasma and that these couplings give rise to displacement-correlations that oscillate in time with a period given effectively by the heavily screened LOPC frequency.

Authors:
 [1];  [2];  [3];  [4];  [2];  [1];  [5];  [1]; ORCiD logo [1];  [1];  [1];  [5];  [5]; ORCiD logo [5];  [5];  [5];  [6]; ORCiD logo [7]; ORCiD logo [7]; ORCiD logo [8] more »;  [5]; ORCiD logo [1] « less
+ Show Author Affiliations
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
  2. University College, Cork (Ireland)
  3. Tyndall National Institute and Department of Physics, University College, Cork, Ireland
  4. University College, Cork (Ireland); Imperial College, London (United Kingdom)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  6. Duke Univ., Durham, NC (United States)
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  8. Univ. of Michigan, Ann Arbor, MI (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Science Foundation Ireland; USDOE
OSTI Identifier:
1862115
Alternate Identifier(s):
OSTI ID: 1845877; OSTI ID: 1854943
Grant/Contract Number:  
AC05-00OR22725; AC02-76SF00515; 15/IA/3160; 12/IA/1601; DE AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Structural Dynamics
Additional Journal Information:
Journal Volume: 9; Journal Issue: 2; Journal ID: ISSN 2329-7778
Publisher:
American Crystallographic Association/AIP
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; x-ray free-electron laser; x-ray diffraction; x-ray scattering; ultrafast science; plasmon; phonon

Citation Formats

Jiang, M. P., Fahy, S., Hauber, A., Murray, É. D., Savić, I., Bray, C., Clark, J. N., Henighan, T., Kozina, M., Lindenberg, A. M., Zalden, P., Chollet, M., Glownia, J. M., Hoffmann, M. C., Sato, T., Zhu, D., Delaire, O., May, A. F., Sales, B. C., Merlin, R., Trigo, M., and Reis, D. A. Observation of photo-induced plasmon–phonon coupling in PbTe via ultrafast x-ray scattering. United States: N. p., 2022. Web. doi:10.1063/4.0000133.
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Jiang, M. P., Fahy, S., Hauber, A., Murray, É. D., Savić, I., Bray, C., Clark, J. N., Henighan, T., Kozina, M., Lindenberg, A. M., Zalden, P., Chollet, M., Glownia, J. M., Hoffmann, M. C., Sato, T., Zhu, D., Delaire, O., May, A. F., Sales, B. C., Merlin, R., Trigo, M., & Reis, D. A. Observation of photo-induced plasmon–phonon coupling in PbTe via ultrafast x-ray scattering. United States. https://doi.org/10.1063/4.0000133
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Jiang, M. P., Fahy, S., Hauber, A., Murray, É. D., Savić, I., Bray, C., Clark, J. N., Henighan, T., Kozina, M., Lindenberg, A. M., Zalden, P., Chollet, M., Glownia, J. M., Hoffmann, M. C., Sato, T., Zhu, D., Delaire, O., May, A. F., Sales, B. C., Merlin, R., Trigo, M., and Reis, D. A. Mon . "Observation of photo-induced plasmon–phonon coupling in PbTe via ultrafast x-ray scattering". United States. https://doi.org/10.1063/4.0000133. https://www.osti.gov/servlets/purl/1862115.
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@article{osti_1862115,
title = {Observation of photo-induced plasmon–phonon coupling in PbTe via ultrafast x-ray scattering},
author = {Jiang, M. P. and Fahy, S. and Hauber, A. and Murray, É. D. and Savić, I. and Bray, C. and Clark, J. N. and Henighan, T. and Kozina, M. and Lindenberg, A. M. and Zalden, P. and Chollet, M. and Glownia, J. M. and Hoffmann, M. C. and Sato, T. and Zhu, D. and Delaire, O. and May, A. F. and Sales, B. C. and Merlin, R. and Trigo, M. and Reis, D. A.},
abstractNote = {We report the observation of photo-induced plasmon–phonon coupled modes in the group IV–VI semiconductor PbTe using ultrafast x-ray diffuse scattering at the Linac Coherent Light Source. We measure the near-zone-center excited-state dispersion of the heavily screened longitudinal optical (LO) phonon branch as extracted from differential changes in x-ray diffuse scattering intensity following above bandgap photoexcitation. We suggest that upon photoexcitation, the LO phonon-plasmon coupled (LOPC) modes themselves become coupled to longitudinal acoustic modes that drive electron band shifts via acoustic deformation potentials and possibly to low-energy single-particle excitations within the plasma and that these couplings give rise to displacement-correlations that oscillate in time with a period given effectively by the heavily screened LOPC frequency.},
doi = {10.1063/4.0000133},
journal = {Structural Dynamics},
number = 2,
volume = 9,
place = {United States},
year = {Mon Mar 14 00:00:00 EDT 2022},
month = {Mon Mar 14 00:00:00 EDT 2022}
}
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https://doi.org/10.1063/4.0000133
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