Theory for the Excitation Spectrum of High-Tc Superconductors: Quasiparticle Dispersion and Shadows of the Fermi Surface
M. Langer, J. Schmalian, S. Grabowski, K. H. Bennemann
DOI 10.1103/PhysRevLett.75.4508 · Physical Review Letters
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Abstract
Using a new method for the solution of the fluctuation exchange approximation equations, which allows the determination of the self-energy Σk(ω) of the 2D one-band Hubbard model on the real frequency axis, we calculate the doping dependence of the quasiparticle excitations of high-Tc superconductors. We obtain new results for the shadows of the Fermi surface, their dependence on the deformation of the quasiparticle dispersion, an anomalous ω dependence of ImΣk(ω), and a related violation of the Luttinger theorem. This sheds new light on the influence of short range magnetic order on the low energy excitations and its significance for photoemission experiments.
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| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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