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Extracting correlation effects from momentum-resolved electron energy loss spectroscopy: Synergistic origin of the dispersion kink in Bi 2.1 Sr 1.9 CaCu2 O 8+x

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [5];  [6];  [6]
  1. Univ. of Illinois at Urbana-Champaign, IL (United States); OSTI
  2. Mahasarakham University (Thailand)
  3. Rice Univ., Houston, TX (United States)
  4. Univ. of British Columbia, Vancouver, BC (Canada)
  5. Harvard Univ., Cambridge, MA (United States)
  6. Univ. of Illinois at Urbana-Champaign, IL (United States)
+ Show Author Affiliations

We employ momentum-resolved electron energy loss spectroscopy (M-EELS) on Bi 2.1 Sr 1.9 CaCu2 O 8+x to resolve the issue of the kink feature in the electron dispersion widely observed in the cuprates. To this end, we utilize the GW approximation to relate the density response function measured in M-EELS to the self-energy, isolating contributions from phonons, electrons, and the momentum dependence of the effective interaction to the decay rates. The phononic contributions, present in the M-EELS spectra due to electron-phonon coupling, lead to kink features in the corresponding single-particle spectra at energies between 40 and 80 meV, independent of the doping level. We find that a repulsive interaction constant in momentum space is able to yield the kink attributed to phonons in ARPES. Hence, our analysis of the M-EELS spectra points to local repulsive interactions as a factor that enhances the spectroscopic signatures of electron-phonon coupling in cuprates. We conclude that the strength of the kink feature in cuprates is determined by the combined action of electron-phonon coupling and electron-electron interactions.

Research Organization:
University of Florida, Gainesville, FL (United States); University of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-05ER46236; SC0021238
OSTI ID:
1849660
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 3 Vol. 103; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (36)

Self-consistent summation of many-particle diagrams on the real frequency axis and its application to the FLEX approximation journal February 1996
Limits to the spatial, energy and momentum resolution of electron energy-loss spectroscopy journal August 2007
Evidence for ubiquitous strong electron–phonon coupling in high-temperature superconductors journal August 2001
High-transition-temperature superconductivity in the absence of the magnetic-resonance mode journal February 2004
Small phonon contribution to the photoemission kink in the copper oxide superconductors journal April 2008
Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3 journal November 2014
Strength of the spin-fluctuation-mediated pairing interaction in a high-temperature superconductor journal January 2009
Exact theory for superconductivity in a doped Mott insulator journal July 2020
A New Landscape of Multiple Dispersion Kinks in a High-T c Cuprate Superconductor journal July 2017
Anomalous density fluctuations in a strange metal journal May 2018
The pseudogap state in high- superconductors: an infrared study journal November 1996
New Method for Calculating the One-Particle Green's Function with Application to the Electron-Gas Problem journal August 1965
Three interaction energy scales in the single-layer high- T c cuprate Hg Ba 2 Cu O 4 + δ journal November 2020
Simple exactly solvable models of non-Fermi-liquids journal January 1998
Dispersion anomalies in cuprate superconductors journal November 2004
One-band tight-binding model parametrization of the high- T c cuprates including the effect of k z dispersion journal August 2005
Systematic study of electron-phonon coupling to oxygen modes across the cuprates journal August 2010
Self-energy effects in electronic Raman spectra of doped cuprates due to magnetic fluctuations journal June 2013
Determinant quantum Monte Carlo study of the two-dimensional single-band Hubbard-Holstein model journal June 2013
Origin of kinks in the energy dispersion of strongly correlated matter journal April 2017
Doping dependence of ordered phases and emergent quasiparticles in the doped Hubbard-Holstein model journal November 2017
Emergent Collective Modes and Kinks in Electronic Dispersions journal February 2009
Quasiparticles in the Superconducting State of Bi 2 Sr 2 CaCu 2 O 8 + δ journal February 2000
Band-Structure Trend in Hole-Doped Cuprates and Correlation with T c max journal July 2001
Doping Dependence of the Coupling of Electrons to Bosonic Modes in the Single-Layer High-Temperature Bi 2 Sr 2 CuO 6 Superconductor journal April 2006
Constituents of the Quasiparticle Spectrum Along the Nodal Direction of High- T c Cuprates journal July 2006
High Energy Scales in the Optical Self-Energy of the Cuprate Superconductors journal May 2007
Temperature-Dependent Ellipsometry Measurements of Partial Coulomb Energy in Superconducting Cuprates journal August 2016
Crossover of Charge Fluctuations across the Strange Metal Phase Diagram journal December 2019
Angle-resolved photoemission studies of the cuprate superconductors journal April 2003
Electrodynamics of high- T c superconductors journal August 2005
Inelastic light scattering from correlated electrons journal January 2007
Colloquium : Identifying the propagating charge modes in doped Mott insulators journal May 2010
Quantitative determination of pairing interactions for high-temperature superconductivity in cuprates journal March 2016
Rapid change of superconductivity and electron-phonon coupling through critical doping in Bi-2212 journal October 2018
Measurement of the dynamic charge response of materials using low-energy, momentum-resolved electron energy-loss spectroscopy (M-EELS) journal January 2017

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Cuprates
Electron energy loss spectroscopy
Electron-phonon coupling
Materials Science
Physics
Superconductivity