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Title: Role of matrix elements in the time-resolved photoemission signal

Abstract

Time- and angle-resolved photoemission spectroscopy (TR-ARPES) provides access to the ultrafast evolution of electrons andmany-body interactions in solid-state systems. However, themomentum- and energy-resolved transient photoemission intensitymay not be unambiguously described by the intrinsic relaxation dynamics of photoexcited electrons alone.The interpretation of the time-dependent photoemission signal can be affected by the transient evolution of the electronic distribution, and both the one-electron removal spectral function aswell as the photoemissionmatrix elements. Here we investigate the topological insulator Bi1.1Sb0.9Te2S to demonstrate, bymeans of a detailed probe-polarization dependent study, the transient contribution ofmatrix elements toTR-ARPES.

Authors:
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Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE National Nuclear Security Administration (NNSA); Max Planck-UBC-UTokyo Centre for Quantum Materials; Canada First Research Excellence Fund (CFREF); Gordon and Betty Moore Foundation; Killam; Alfred P. Sloan Foundation; Natural Sciences and Engineering Research Council of Canada (NSERC); Steacie Memorial Fellowships; Alexander von Humboldt Fellowship; Canada Research Chairs Program; Canada Foundation for Innovation (CFI); British Columbia Knowledge Development Fund (BCKDF); CIFAR; Swiss National Science Foundation (SNF); Ministry for Instruction, University and Research (MIUR); Università Cattolica del Sacro Cuore; European Union’s Horizon 2020
OSTI Identifier:
1600578
Alternate Identifier(s):
OSTI ID: 1634949
Report Number(s):
LA-UR-18-30021
Journal ID: ISSN 1367-2630
Grant/Contract Number:  
89233218CNA000001; GBMF4779; P300P2_164649; D.1; D.2.2; D.3.1; 785219 GrapheneCore2
Resource Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Name: New Journal of Physics Journal Volume: 22 Journal Issue: 2; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Country of Publication:
United Kingdom
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; high magnetic field xcience; time- and angle-resolved photoemission spectroscopy (TR-ARPES); matrix-elements; topological insulators; ultrafast electron dynamics

Citation Formats

Boschini, F., Bugini, D., Zonno, M., Michiardi, M., Day, R. P., Razzoli, E., Zwartsenberg, B., Schneider, M., da Silva Neto, E. H., dal Conte, S., Kushwaha, S. K., Cava, R. J., Zhdanovich, S., Mills, A. K., Levy, G., Carpene, E., Dallera, C., Giannetti, C., Jones, D. J., Cerullo, G., and Damascelli, A.. Role of matrix elements in the time-resolved photoemission signal. United Kingdom: N. p., 2020. Web. doi:10.1088/1367-2630/ab6eb1.
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Boschini, F., Bugini, D., Zonno, M., Michiardi, M., Day, R. P., Razzoli, E., Zwartsenberg, B., Schneider, M., da Silva Neto, E. H., dal Conte, S., Kushwaha, S. K., Cava, R. J., Zhdanovich, S., Mills, A. K., Levy, G., Carpene, E., Dallera, C., Giannetti, C., Jones, D. J., Cerullo, G., & Damascelli, A.. Role of matrix elements in the time-resolved photoemission signal. United Kingdom. https://doi.org/10.1088/1367-2630/ab6eb1
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Boschini, F., Bugini, D., Zonno, M., Michiardi, M., Day, R. P., Razzoli, E., Zwartsenberg, B., Schneider, M., da Silva Neto, E. H., dal Conte, S., Kushwaha, S. K., Cava, R. J., Zhdanovich, S., Mills, A. K., Levy, G., Carpene, E., Dallera, C., Giannetti, C., Jones, D. J., Cerullo, G., and Damascelli, A.. Tue . "Role of matrix elements in the time-resolved photoemission signal". United Kingdom. https://doi.org/10.1088/1367-2630/ab6eb1.
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@article{osti_1600578,
title = {Role of matrix elements in the time-resolved photoemission signal},
author = {Boschini, F. and Bugini, D. and Zonno, M. and Michiardi, M. and Day, R. P. and Razzoli, E. and Zwartsenberg, B. and Schneider, M. and da Silva Neto, E. H. and dal Conte, S. and Kushwaha, S. K. and Cava, R. J. and Zhdanovich, S. and Mills, A. K. and Levy, G. and Carpene, E. and Dallera, C. and Giannetti, C. and Jones, D. J. and Cerullo, G. and Damascelli, A.},
abstractNote = {Time- and angle-resolved photoemission spectroscopy (TR-ARPES) provides access to the ultrafast evolution of electrons andmany-body interactions in solid-state systems. However, themomentum- and energy-resolved transient photoemission intensitymay not be unambiguously described by the intrinsic relaxation dynamics of photoexcited electrons alone.The interpretation of the time-dependent photoemission signal can be affected by the transient evolution of the electronic distribution, and both the one-electron removal spectral function aswell as the photoemissionmatrix elements. Here we investigate the topological insulator Bi1.1Sb0.9Te2S to demonstrate, bymeans of a detailed probe-polarization dependent study, the transient contribution ofmatrix elements toTR-ARPES.},
doi = {10.1088/1367-2630/ab6eb1},
journal = {New Journal of Physics},
number = 2,
volume = 22,
place = {United Kingdom},
year = {2020},
month = {2}
}
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Publisher's Version of Record
https://doi.org/10.1088/1367-2630/ab6eb1
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Cited by: 4 works
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Figures / Tables:

Figure 1 Figure 1: (a)Pictorial sketch of how a transient modification of the matrix element may affect the extraction of the intrinsic electron relaxation time from the evolution of the photoemission intensity: blue line, matrix element |M|2, modeled as a single-exponential function with a decay time of 15 ps convoluted with amore » 0.25 ps Gaussian function,≈15% maximum variation; black line, electronic distribution f, modeled as a single-exponential function with a decay time of 5 ps convoluted with a 0.4 ps Gaussian function,≈−25% maximum variation; red line, photoemission intensity, IPES= f ∙ |M|2. (b)Bi1.1Sb0.9Te2S layered-crystal structure. (c) 6.2 eV ARPES maps for τ<0, along $\bar{Γ}$–$\bar{M }$, acquired at 6 K with vertically (s) and horizontally (p) polarized light. The inset shows the hexagonal projected Brillouin zone with two high-symmetry directions. (d) TR-ARPES mapping (s-polarization) of the conduction band along $\bar{Γ}$–$\bar{M }$ for+0.3 ps and+1.1 ps pump-probe delays.« less
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