Evolution of plasmon excitations across the phase diagram of the cuprate superconductor
Abstract
We use resonant inelastic x-ray scattering (RIXS) at the O K- and Cu K-edges to investigate the doping dependence and temperature dependence of low-energy plasmon excitations in La2–xSrxCuO4. We observe a monotonic increase of the energy scale of the plasmons with increasing doping x in the underdoped regime, whereas a saturation occurs above optimal doping x ≳ 0.16 and persists at least up to x = 0.4. Furthermore, we find that the plasmon excitations show only a marginal temperature dependence, and possible effects due to the superconducting transition and the onset of strange metal behavior are either absent or below the detection limit of our experiment. Taking into account the strongly correlated character of the cuprates, we show that layered t – J – V model calculations accurately capture the increase of the plasmon energy in the underdoped regime. However, the computed plasmon energy continues to increase even for doping levels above x ≳ 0.16, which is distinct from the experimentally observed saturation and reaches a broad maximum around x = 0.55. We discuss whether possible lattice disorder in overdoped samples, a renormalization of the electronic correlation strength at high dopings, or an increasing relevance of nonplanar Cu and Omore »
- Authors:
- more »
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); Japan Society for the Promotion of Science (JSPS) (KAKENHI)
- OSTI Identifier:
- 1986580
- Alternate Identifier(s):
- OSTI ID: 2229141
- Grant/Contract Number:
- AC02-06CH11357; JP20H01856
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Name: Physical Review. B Journal Volume: 107 Journal Issue: 21; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Hepting, M., Boyko, T. D., Zimmermann, V., Bejas, M., Suyolcu, Y. E., Puphal, P., Green, R. J., Zinni, L., Kim, J., Casa, D., Upton, M. H., Wong, D., Schulz, C., Bartkowiak, M., Habicht, K., Pomjakushina, E., Cristiani, G., Logvenov, G., Minola, M., Yamase, H., Greco, A., and Keimer, B. Evolution of plasmon excitations across the phase diagram of the cuprate superconductor La 2 − x Sr x CuO 4. United States: N. p., 2023.
Web. doi:10.1103/PhysRevB.107.214516.
Hepting, M., Boyko, T. D., Zimmermann, V., Bejas, M., Suyolcu, Y. E., Puphal, P., Green, R. J., Zinni, L., Kim, J., Casa, D., Upton, M. H., Wong, D., Schulz, C., Bartkowiak, M., Habicht, K., Pomjakushina, E., Cristiani, G., Logvenov, G., Minola, M., Yamase, H., Greco, A., & Keimer, B. Evolution of plasmon excitations across the phase diagram of the cuprate superconductor La 2 − x Sr x CuO 4. United States. https://doi.org/10.1103/PhysRevB.107.214516
Hepting, M., Boyko, T. D., Zimmermann, V., Bejas, M., Suyolcu, Y. E., Puphal, P., Green, R. J., Zinni, L., Kim, J., Casa, D., Upton, M. H., Wong, D., Schulz, C., Bartkowiak, M., Habicht, K., Pomjakushina, E., Cristiani, G., Logvenov, G., Minola, M., Yamase, H., Greco, A., and Keimer, B. Mon .
"Evolution of plasmon excitations across the phase diagram of the cuprate superconductor La 2 − x Sr x CuO 4". United States. https://doi.org/10.1103/PhysRevB.107.214516.
@article{osti_1986580,
title = {Evolution of plasmon excitations across the phase diagram of the cuprate superconductor La 2 − x Sr x CuO 4},
author = {Hepting, M. and Boyko, T. D. and Zimmermann, V. and Bejas, M. and Suyolcu, Y. E. and Puphal, P. and Green, R. J. and Zinni, L. and Kim, J. and Casa, D. and Upton, M. H. and Wong, D. and Schulz, C. and Bartkowiak, M. and Habicht, K. and Pomjakushina, E. and Cristiani, G. and Logvenov, G. and Minola, M. and Yamase, H. and Greco, A. and Keimer, B.},
abstractNote = {We use resonant inelastic x-ray scattering (RIXS) at the O K- and Cu K-edges to investigate the doping dependence and temperature dependence of low-energy plasmon excitations in La2–xSrxCuO4. We observe a monotonic increase of the energy scale of the plasmons with increasing doping x in the underdoped regime, whereas a saturation occurs above optimal doping x ≳ 0.16 and persists at least up to x = 0.4. Furthermore, we find that the plasmon excitations show only a marginal temperature dependence, and possible effects due to the superconducting transition and the onset of strange metal behavior are either absent or below the detection limit of our experiment. Taking into account the strongly correlated character of the cuprates, we show that layered t – J – V model calculations accurately capture the increase of the plasmon energy in the underdoped regime. However, the computed plasmon energy continues to increase even for doping levels above x ≳ 0.16, which is distinct from the experimentally observed saturation and reaches a broad maximum around x = 0.55. We discuss whether possible lattice disorder in overdoped samples, a renormalization of the electronic correlation strength at high dopings, or an increasing relevance of nonplanar Cu and O orbitals could be responsible for the discrepancy between experiment and theory for doping levels above x = 0.16.},
doi = {10.1103/PhysRevB.107.214516},
journal = {Physical Review. B},
number = 21,
volume = 107,
place = {United States},
year = {Mon Jun 26 00:00:00 EDT 2023},
month = {Mon Jun 26 00:00:00 EDT 2023}
}
https://doi.org/10.1103/PhysRevB.107.214516
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- Reviews of Modern Physics, Vol. 77, Issue 2
Stability of the Zhang-Rice Singlet with Doping in Lanthanum Strontium Copper Oxide Across the Superconducting Dome and Above
journal, July 2015
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Apical oxygen ions and the electronic structure of the high- cuprates
journal, May 1992
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Characterizing the three-orbital Hubbard model with determinant quantum Monte Carlo
journal, April 2016
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Implications of resonant inelastic x-ray scattering data for theoretical models of cuprates
journal, November 2013
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Stranger than metals
journal, July 2022
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