High energy fluctuation spectra in cuprates from infrared optical spectroscopy

Abstract

Coupling of the charge carriers in the high temperature superconducting oxides to bosonic modes has been widely reported using a variety of experimental probes. These include angular resolved photoemission (ARPES), scanning tunnelling spectroscopy (STS), Raman scattering (RS) and infrared optical spectroscopy (IRS). The energy scale investigated has been mostly limited to a relatively small range up to 300 meV or so. Although some ARPES experiments report boson structure up to 800 meV in the dressed electron dispersion curves the data are not analyzed to recover the spectral density of the fluctuation spectrum. We have extended to higher energies up to 2.2 eV the usual maximum entropy technique used to invert optical data so as to obtain an electron-boson spectral density. This has required that we include in our inversions, the calculated (LDA) particle-hole symmetrized energy dependent electronic density of states (DOS). Our analysis reveals that significant spectral weight remains in the fluctuation spectra up to 2.2 eV in the Bi-2212 family and to 1.2 eV in Bi-2201 for all doping levels considered.

arXiv comment6 pages, 5 figures

References in corpus (28)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• On the Doping and Temperature Dependence of the Mass Enhancement Observed in the Cuprate Bi2212
• High-transition-temperature superconductivity in the absence of the magnetic-resonance mode
• Electronic Origin of the Inhomogeneous Pairing Interaction in the High-Tc Superconductor Bi2Sr2CaCu2O8+d
• Doping dependent optical properties of Bi2Sr2CaCu2O8+d
• Optical determination of the relation between the electron-boson coupling function and the critical temperature in high T${}_c$ cuprates
• Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates
• Bosons in high temperature superconductors: an experimental survey
• Identification of a New Form of Electron Coupling in Bi2Sr2CaCu2O8 Superconductor by Laser-Based Angle-Resolved Photoemission
• Direct extraction of the Eliashberg function for electron-phonon coupling: A case study of Be(1010)
• Inversion of K${}_3$C${}_{60}$ Reflectance Data
• The a-axis optical conductivity of detwinned ortho-II YBa_2Cu_3O_6.50
• Optical spectroscopy of superconducting Ba{0.55}K{0.45}Fe2As2: evidence for strong coupling to low energy bosons
• Inversion techniques for optical conductivity data
• Persistence of Strong Electron Coupling to a Narrow Boson Spectrum in Overdoped BiSrCaCuO (Bi2212) Tunneling Data
• Effects of energy dependence in the quasiparticle density of states on far-infrared absorption in the pseudogap state
• Imaging the essential role of spin-fluctuations in high-Tc superconductivity
• Momentum Dependence of the Single-Particle Self-Energy and Fluctuation Spectrum of Slightly Underdoped Bi_2 Sr_2 CaCu_2 O_{8+δ} from High Resolution Laser ARPES
• Spin Dynamics in Cuprates: Optical Conductivity of HgBa2CuO4
• Bosonic spectral density of epitaxial thin-film La1.83Sr0.17CuO4 superconductors from infrared conductivity measurements
• Finite band inversion of ARPES in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ in comparison with optics
• Through a Lattice Darkly -- Shedding Light on Electron-Phonon Coupling in the High T${}_c$ Cuprates
• Electron-boson glue function derived from electronic Raman scattering
• Doping evolution of the optical scattering rate and effective mass of Bi(2)Sr(2-x)La(x)CuO(6)
• Determination of boson spectrum from optical data in pseudogap phase of underdoped cuprates
• Self Energy and Fluctuation Spectra in Cuprates: Comparing Optical and Photoemission Results
• Evolution of electron-boson spectral density in the underdoped region of Bi_2Sr_{2-x}La_xCuO_6

Cited by in corpus (5)

• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Intermediate Coupling Model of the Cuprates
• Intrinsic temperature-dependent evolutions in the electron-boson spectral density obtained from optical data
• Infrared properties of cuprates in the pseudogap state: A study of Mitrovic-Fiorucci and Sharapov-Carbotte scattering rates
• Electron-boson spectral density of LiFeAs obtained from optical data