Influence of incommensurate dynamic charge-density-wave scattering on the photoemission line shape of superconducting high-Tc cuprates
G. Seibold, M. Grilli
DOI 10.1103/PhysRevB.63.224505 · Physical Review B
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Abstract
We show that the spectral line shape of superconducting La2−xSrxCuO4 (LSCO) and Bi2Sr2CaCu2O8+δ (Bi2212) can be well described by the coupling of the charge carriers to collective incommensurate charge-density-wave (CDW) excitations. Our results imply that besides antiferromagnetic fluctuations also low-energy CDW modes can contribute to the observed dip-hump structure in the Bi2212 photoemission spectra. In case of underdoped LSCO we propose a possible interpretation of angle resolved photoemission spectroscopy data in terms of a grid pattern of fluctuating stripes where the charge and spin scattering directions deviate by α=π/4. Within this scenario we find that the spectral intensity along (0,0)→(π,π) is strongly suppressed, consistent with recent photoemission experiments. In addition, the incommensurate charge-density-wave scattering leads to a significant broadening of the quasiparticle peak around (π,0).
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure not reported | onset |
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