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Title: Enhanced Electron-Phonon Coupling for Charge-Density-Wave Formation in La1.8-$$x$$Eu0.2Sr$$x$$CuO4+$$δ$$

Abstract

Charge density wave (CDW) correlations are prevalent in all copper-oxide superconductors. While CDWs in conventional metals are driven by coupling between lattice vibrations and electrons, the role of the electron-phonon coupling (EPC) in cuprate CDWs is strongly debated. Using Cu L3 edge resonant inelastic x-ray scattering, we study the CDW and Cu-O bond-stretching phonons in the stripe-ordered cuprate La1.8-xEu0.2SrxCuO4+δ. In this work, we investigate the interplay between charge order and EPC as a function of doping and temperature and find that the EPC is enhanced in a narrow momentum region around the CDW ordering vector. By detuning the incident photon energy from the absorption resonance, we extract an EPC matrix element at the CDW ordering vector of M ≃ 0.36 eV , which decreases to M ≃ 0.30 eV at high temperature in the absence of the CDW. Our results suggest a feedback mechanism in which the CDW enhances the EPC which, in turn, further stabilizes the CDW.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [2];  [2];  [2];  [4]; ORCiD logo [4]; ORCiD logo [4];  [2]
+ Show Author Affiliations
  1. Univ. of Illinois, Urbana, IL (United States); Peking Univ., Beijing (China)
  2. Univ. of Illinois, Urbana, IL (United States)
  3. Univ. of Illinois, Urbana, IL (United States); Harvard Univ., Cambridge, MA (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation
OSTI Identifier:
1661642
Alternate Identifier(s):
OSTI ID: 1958768
Report Number(s):
BNL-219830-2020-JAAM
Journal ID: ISSN 0031-9007; TRN: US2203608
Grant/Contract Number:  
SC0012704; FG02-06ER46285; SC0012368; GBMF4542
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 125; Journal Issue: 9; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; charge density waves; electron-phonon coupling; electronic structure; impurities in superconductors; superconducting phase transition; cuprates; high-temperature superconductors; resonant inelastic x-ray scattering; Resonant inelastic x-ray scattering, electron-phonon interaction

Citation Formats

Peng, Y.  Y., Husain, A.  A., Mitrano, M., Sun, S.  X.-L., Johnson, T.  A., Zakrzewski, A.  V., MacDougall, G.  J., Barbour, A., Jarrige, I., Bisogni, V., and Abbamonte, P. Enhanced Electron-Phonon Coupling for Charge-Density-Wave Formation in La1.8-$x$Eu0.2Sr$x$CuO4+$δ$. United States: N. p., 2020. Web. doi:10.1103/physrevlett.125.097002.
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Peng, Y.  Y., Husain, A.  A., Mitrano, M., Sun, S.  X.-L., Johnson, T.  A., Zakrzewski, A.  V., MacDougall, G.  J., Barbour, A., Jarrige, I., Bisogni, V., & Abbamonte, P. Enhanced Electron-Phonon Coupling for Charge-Density-Wave Formation in La1.8-$x$Eu0.2Sr$x$CuO4+$δ$. United States. https://doi.org/10.1103/physrevlett.125.097002
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Peng, Y.  Y., Husain, A.  A., Mitrano, M., Sun, S.  X.-L., Johnson, T.  A., Zakrzewski, A.  V., MacDougall, G.  J., Barbour, A., Jarrige, I., Bisogni, V., and Abbamonte, P. Tue . "Enhanced Electron-Phonon Coupling for Charge-Density-Wave Formation in La1.8-$x$Eu0.2Sr$x$CuO4+$δ$". United States. https://doi.org/10.1103/physrevlett.125.097002. https://www.osti.gov/servlets/purl/1661642.
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@article{osti_1661642,
title = {Enhanced Electron-Phonon Coupling for Charge-Density-Wave Formation in La1.8-$x$Eu0.2Sr$x$CuO4+$δ$},
author = {Peng, Y.  Y. and Husain, A.  A. and Mitrano, M. and Sun, S.  X.-L. and Johnson, T.  A. and Zakrzewski, A.  V. and MacDougall, G.  J. and Barbour, A. and Jarrige, I. and Bisogni, V. and Abbamonte, P.},
abstractNote = {Charge density wave (CDW) correlations are prevalent in all copper-oxide superconductors. While CDWs in conventional metals are driven by coupling between lattice vibrations and electrons, the role of the electron-phonon coupling (EPC) in cuprate CDWs is strongly debated. Using Cu L3 edge resonant inelastic x-ray scattering, we study the CDW and Cu-O bond-stretching phonons in the stripe-ordered cuprate La1.8-xEu0.2SrxCuO4+δ. In this work, we investigate the interplay between charge order and EPC as a function of doping and temperature and find that the EPC is enhanced in a narrow momentum region around the CDW ordering vector. By detuning the incident photon energy from the absorption resonance, we extract an EPC matrix element at the CDW ordering vector of M ≃ 0.36 eV , which decreases to M ≃ 0.30 eV at high temperature in the absence of the CDW. Our results suggest a feedback mechanism in which the CDW enhances the EPC which, in turn, further stabilizes the CDW.},
doi = {10.1103/physrevlett.125.097002},
journal = {Physical Review Letters},
number = 9,
volume = 125,
place = {United States},
year = {Tue Aug 25 00:00:00 EDT 2020},
month = {Tue Aug 25 00:00:00 EDT 2020}
}
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https://doi.org/10.1103/physrevlett.125.097002
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