Journal ArticleDOI
Plasmon dispersion and the dielectric function in YBa2Cu4O8 single crystals
TLDR
In this paper, the in-plane loss function between 0 and 50 eV and the plasmon dispersion of YBa 2 Cu 4 O 8 single crystals were investigated and the Fermi velocity and the effective mass of the charge carriers were derived.Abstract:
Electron energy-loss spectroscopy studies have been performed in order to investigate the in-plane loss function between 0 and 50 eV and the plasmon dispersion of YBa 2 Cu 4 O 8 single crystals. Strongly anisotropic dielectric functions and plasmon frequencies have been observed. The plasmon dispersion has been found to be quadratic, with an a-b anisotropy of about two. The Fermi velocity and the effective mass of the charge carriers could be derived.read more
Citations
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Journal ArticleDOI
Electron energy-loss spectroscopy: A versatile tool for the investigations of plasmonic excitations
TL;DR: In this article, the authors highlight the improvements of the electron energy-loss spectrometer in the last years, summarize current possibilities with this technique, and give examples where the investigation of the plasmon dispersion allows insight into the interplay of the conduction electrons with other degrees of freedom.
Journal ArticleDOI
Holographic plasmon relaxation with and without broken translations
TL;DR: In this article, the dispersion relation of the plasmonic modes in detail for an illustrative class of holographic bottom-up models is analyzed for strongly coupled and quantum critical systems using the holographic framework.
Journal ArticleDOI
Anomalous attenuation of plasmons in strange metals and holography
TL;DR: In this paper, it was shown that in strongly entangled strange metals plasmons are always short-lived, regardless of their wavelength, and decay into a quantum critical continuum, which replaces Landau damping at any wavelength.
Journal ArticleDOI
Holographic Plasmon Relaxation with and without Broken Translations
TL;DR: In this article, the dispersion relation of the plasmonic modes in detail for an illustrative class of holographic bottom-up models is analyzed for strongly coupled and quantum critical systems using the holographic framework.
Journal ArticleDOI
Density response of holographic metallic IR fixed points with translational pseudo-spontaneous symmetry breaking
TL;DR: In this paper, the density response of charged liquids contains a collective excitation known as the plasmon, which is traced back to the presence of zero-sound in holographic systems with translational invariance.
References
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Journal ArticleDOI
Possible high Tc superconductivity in the Ba-La-Cu-O system
TL;DR: In this paper, Ba−La−Cu−O system, with the composition BaxLa5−xCu5O5(3−y) have been prepared in polycrystalline form, and samples with x=1 and 0.75,y>0, annealed below 900°C under reducing conditions, consist of three phases, one of them a perovskite-like mixed-valent copper compound.
Journal ArticleDOI
Optical spectra of La2-xSrxCuO4 : effect of carrier doping on the electronic structure of the CuO2 plane
TL;DR: The resulting spectrum in the high-{ital T}{sub {ital c}} regime is suggestive of a strongly itinerant character of the state in the moderately doped CuO{sub 2} plane while appreciable weight remains in the charge-transfer energy region.
Book
Excitation of Plasmons and Interband Transitions by Electrons
TL;DR: Interacting with Visual Interfaces on Mobile Devices, Investigating Entertainment and Learning in a Multi-User 3D Virtual Environment and more.
Journal ArticleDOI
Bulk synthesis of the 81-K superconductor YBa2Cu4O8 at high oxygen pressure
TL;DR: In this paper, the authors reported synthesis of the superconducting phase YBa2Cu4O8 ('124') in bulk at 400 bar O2 and 1,040 °C.