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Observation of photo-induced plasmon-phonon coupling in PbTe via ultrafast x-ray scattering.

Publication ,  Journal Article
Jiang, MP; Fahy, S; Hauber, A; Murray, ÉD; Savić, I; Bray, C; Clark, JN; Henighan, T; Kozina, M; Lindenberg, AM; Zalden, P; Chollet, M ...
Published in: Structural dynamics (Melville, N.Y.)
March 2022

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.

Duke Scholars

Published In

Structural dynamics (Melville, N.Y.)

DOI

EISSN

2329-7778

ISSN

2329-7778

Publication Date

March 2022

Volume

9

Issue

2

Start / End Page

024301

Related Subject Headings

  • 5107 Particle and high energy physics
  • 5104 Condensed matter physics
  • 3406 Physical chemistry
 

Citation

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Jiang, M. P., Fahy, S., Hauber, A., Murray, É. D., Savić, I., Bray, C., … Reis, D. A. (2022). Observation of photo-induced plasmon-phonon coupling in PbTe via ultrafast x-ray scattering. Structural Dynamics (Melville, N.Y.), 9(2), 024301. https://doi.org/10.1063/4.0000133
Jiang, M. P., S. Fahy, A. Hauber, É. D. Murray, I. Savić, C. Bray, J. N. Clark, et al. “Observation of photo-induced plasmon-phonon coupling in PbTe via ultrafast x-ray scattering.Structural Dynamics (Melville, N.Y.) 9, no. 2 (March 2022): 024301. https://doi.org/10.1063/4.0000133.
Jiang MP, Fahy S, Hauber A, Murray ÉD, Savić I, Bray C, et al. Observation of photo-induced plasmon-phonon coupling in PbTe via ultrafast x-ray scattering. Structural dynamics (Melville, NY). 2022 Mar;9(2):024301.
Jiang, M. P., et al. “Observation of photo-induced plasmon-phonon coupling in PbTe via ultrafast x-ray scattering.Structural Dynamics (Melville, N.Y.), vol. 9, no. 2, Mar. 2022, p. 024301. Epmc, doi:10.1063/4.0000133.
Jiang MP, Fahy S, Hauber A, Murray ÉD, Savić I, Bray C, Clark JN, Henighan T, Kozina M, Lindenberg AM, Zalden P, Chollet M, Glownia JM, Hoffmann MC, Sato T, Zhu D, Delaire O, May AF, Sales BC, Merlin R, Trigo M, Reis DA. Observation of photo-induced plasmon-phonon coupling in PbTe via ultrafast x-ray scattering. Structural dynamics (Melville, NY). 2022 Mar;9(2):024301.

Published In

Structural dynamics (Melville, N.Y.)

DOI

EISSN

2329-7778

ISSN

2329-7778

Publication Date

March 2022

Volume

9

Issue

2

Start / End Page

024301

Related Subject Headings

  • 5107 Particle and high energy physics
  • 5104 Condensed matter physics
  • 3406 Physical chemistry