Spectral Function of Superconducting Cuprates near Optimal Doping
Andrey V. Chubukov, Dirk K. Morr
DOI 10.1103/PhysRevLett.81.4716 · Physical Review Letters
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Abstract
We argue that the unusual peak-dip-hump features observed in photoemission experiments on Bi2212 at T≪Tc can be explained by the interaction of the fermionic quasiparticles with overdamped spin fluctuations. We show that the strong spin-fermion interaction combined with the feedback effect on the spin damping due to superconductivity yields the fermionic spectral function A(kF,ω) which simultaneously displays a quasiparticle peak at ω=Δ and a broad maximum (hump) at ω≫Δ. In between the two regimes, the spectral function has a dip at ω∼2Δ. We argue that our theory also explains the tunneling data.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2212 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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