skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electron-phonon coupling in the undoped cuprate YBa2Cu3O6 estimated from Raman and optical conductivity spectra

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [5]; ORCiD logo [5];  [6];  [2]
  1. Scuola Normale Superiore, Pisa (Italy); Istituto Italiano di Tecnologia Center for Nanotechnology Innovation @NEST, Pisa (Italy)
  2. Univ. di Napoli Federico II, Napoli (Italy)
  3. RIKEN Center for Emergent Matter Science (CEMS), Saitama (Japan); NRC “Kurchatov Institute,” Moscow (Russia)
  4. RIKEN Center for Emergent Matter Science (CEMS), Saitama (Japan); Univ. of Tokyo (Japan)
  5. Univ. of Colorado, Boulder, CO (United States)
  6. Karlsruhe Inst. of Technology (KIT) (Germany)

We study experimentally the Raman response of the undoped high-Tc parent compound YBa2Cu3O6, and give a unified theory of the two-magnon Raman peak and optical conductivity based on the Hubbard-Holstein model with electron-phonon coupling (EPC). The Hubbard model without EPC can qualitatively account for the experimentally observed resonance of the Raman response, but only the Hubbard-Holstein model (i) reproduces the asymmetry of the Raman spectrum, (ii) validates the experimental visibility of the two-magnon peak, and (iii) predicts the correct shape and energy of the lower edge of the charge transfer gap in optical conductivity. A comparison of experiments with the theory gives the EPC strength λ = 0.6. Here, this result convincingly indicates the vital role of EPC in high-Tc cuprates, providing a clue to the mechanism of high Tc.

Research Organization:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Organization:
USDOE
Award DOI(s):
https://doi.org/CFDA No. 81.049
Awarding Organization: Office of Science, SC-1, U.S. Department of Energy

Grant/Contract Number:
SC0006939
OSTI ID:
1842507
Journal Information:
Physical Review B, Vol. 98, Issue 12; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (52)

Excitons and two-magnon Raman scattering of the strongly correlated systems La 2 CuO 4 and YBa 2 Cu 3 O 6 journal September 2000
Polaronic Behavior of Undoped High- T c Cuprate Superconductors from Angle-Resolved Photoemission Spectra journal November 2005
Resonant two-magnon Raman scattering in cuprate antiferromagnetic insulators journal May 1996
Resonant Two-Magnon Raman Scattering and Photoexcited States in Two-Dimensional Mott Insulators text January 2002
Interplay between electron–phonon and Coulomb interactions in cuprates journal January 2008
Numerical calculations of the B 1 g Raman spectrum of the two-dimensional Heisenberg model journal April 1998
Photoinduced absorptions inside the Mott gap in the two-dimensional extended Hubbard model journal November 2017
Development of the optical conductivity with doping in single-domain YBa 2 Cu 3 O 6 + x journal February 1992
Sharp Transition for Single Polarons in the One-Dimensional Su-Schrieffer-Heeger Model journal December 2010
Theory of phonon-assisted multimagnon optical absorption and bimagnon states in quantum antiferromagnets journal October 1995
Inelastic light scattering from correlated electrons journal January 2007
Strongly correlated electronic systems with one hole: Dynamical properties journal May 1990
Charge-induced nematicity in FeSe journal August 2016
Two-magnon Raman scattering in cuprate superconductors: Evolution of magnetic fluctuations with doping journal May 1994
Effects of longer-range interactions on unconventional superconductivity journal January 2012
Polaronic metal in lightly doped high-T c cuprates journal August 2011
Interplay between electron-phonon and Coulomb interactions in cuprates text January 2007
Resonant two-magnon Raman scattering in antiferromagnetic insulators text January 1994
Charge Nematicity and Electronic Raman Scattering in Iron-based Superconductors text January 2015
Electron – phonon coupling in underdoped high-temperature superconductors journal December 2009
Striped phases in the two-dimensional Hubbard model with long-range Coulomb interaction journal November 1998
Twisted boundary conditions and effective mass in Heisenberg-Ising and Hubbard rings journal July 1990
Photoinduced absorptions inside the Mott gap in the two-dimensional extended Hubbard model text January 2017
Mid-infrared optical absorption in undoped lamellar copper oxides journal September 1993
Electron-Phonon Interaction and Antiferromagnetic Correlations journal July 2006
Quantum Dynamics of the Hubbard-Holstein Model in Equilibrium and Non-Equilibrium: Application to Pump-Probe Phenomena text January 2012
Frequency- and temperature-dependent conductivity in YBa 2 Cu 3 O 6 + x crystals journal October 1990
Nonlocal Composite Spin-Lattice Polarons in High Temperature Superconductors journal October 2007
Resonant Two-Magnon Raman Scattering and Photoexcited States in Two-Dimensional Mott Insulators journal December 2002
Resonant Raman scattering in antiferromagnets journal October 1997
Magnetic excitations and amplitude fluctuations in insulating cuprates journal January 2018
Electron-Phonon Interaction in the t J Model journal April 2004
Charge nematicity and electronic Raman scattering in iron-based superconductors journal January 2016
Density fluctuations and phonon renormalization in the t-J model journal August 1997
Resonant Raman Scattering in Antiferromagnets text January 1997
Optical properties of an effective one-band Hubbard model for the cuprates journal September 1997
Resonant Two-Magnon Raman Scattering in Antiferromagnetic Insulators journal April 1995
Magnetic excitations and amplitude fluctuations in insulating cuprates text January 2017
Inelastic Light Scattering From Correlated Electrons text January 2006
Doping a Mott insulator: Physics of high-temperature superconductivity journal January 2006
Sharp transition for single polarons in the one-dimensional Su-Schrieffer-Heeger model text January 2010
Charge-transfer fluctuation, d -wave superconductivity, and the B 1 g Raman phonon in cuprates journal January 1995
Theory of Raman scattering in Mott-Hubbard systems journal August 1990
Quantum Dynamics of the Hubbard-Holstein Model in Equilibrium and Nonequilibrium: Application to Pump-Probe Phenomena journal October 2012
Two-magnon and two-phonon excitations in some parent insulating compounds of the high- T c cuprates journal September 1992
Photoconductivity in insulating YBa 2 Cu 3 O 6 + x : From Mott-Hubbard insulator to Fermi glass via oxygen doping journal September 1993
Effective single-band models for the high- T c cuprates. I. Coulomb interactions journal April 1996
Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system journal October 2014
Effect of conduction electrons on the polarized Raman spectra of copper oxide superconductors journal November 1992
Electron-Phonon Coupling and a Polaron in the t J Model: From the Weak to the Strong Coupling Regime journal July 2004
Optical conductivity of polarons: Double phonon cloudconcept verified by diagrammatic Monte Carlo simulations journal March 2012
Apparent Electron-Phonon Interaction in Strongly Correlated Systems journal November 2004