Electron spectrum in high-temperature cuprate superconductors
نویسندگان
چکیده
منابع مشابه
Resistance of High-Temperature Cuprate Superconductors
Cuprate superconductors have many different atoms per unit cell. A large fraction of cells (525%) must be modified (“doped”) before the material superconducts. Thus it is not surprising that there is little consensus on the superconducting mechanism, despite almost 200,000 papers [1]. Most astonishing is that for the simplest electrical property, the resistance, “despite sustained theoretical e...
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Photoemission studies show the presence of a high-energy anomaly in the observed band dispersion for two families of cuprate superconductors, Bi2Sr2CaCu2O8+delta and La 2-x BaxCuO4. The anomaly, which occurs at a binding energy of approximately 340 meV, is found to be anisotropic and relatively weakly doping dependent. Scattering from short range or nearest neighbor spin excitations is found to...
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Computational details Calculations to compute the pseudogap (PG) from Equation 1 were performed by averaging 100 ensembles of 2,500 x 2,500 lattices. Four-site plaquettes were randomly doped up to x = 0.187, then three-site plaquettes up to x = 0.226, followed by two-site plaquettes to x = 0.271, and finally one-site plaquettes were doped until no d spins remained at x = 0.317. The details of t...
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Within the time-dependent Gutzwiller approximation for the Hubbard model we compute the magnetic fluctuations of vertical metallic stripes with parameters appropriate for La(1.875)Ba(0.125)CuO(4) (LBCO). For bond- and site-centered stripes the excitation spectra are similar, consisting of a low-energy incommensurate acoustic branch which merges into a "resonance peak" at the antiferromagnetic w...
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We show that the asymmetric tunneling spectrum observed in the cuprate superconductors stems from the existence of a competing order. The competition between the competing order and superconductivity can create a charge depletion region near the surface. The asymmetric response of the depletion region as the function of the external voltage causes the asymmetric tunneling spectrum. The effect i...
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ژورنال
عنوان ژورنال: Journal of Experimental and Theoretical Physics
سال: 2007
ISSN: 1063-7761,1090-6509
DOI: 10.1134/s1063776107020082