Momentum, Temperature, and Doping Dependence of Photoemission Lineshape and Implications for the Nature of the Pairing Potential in High- Tc Superconducting Materials

Z.-X. Shen; J. R. Schrieffer

doi:10.1103/PhysRevLett.78.1771

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Momentum, Temperature, and Doping Dependence of Photoemission Lineshape and Implications for the Nature of the Pairing Potential in High- Tc Superconducting Materials

Z.-X. Shen, J. R. Schrieffer

DOI 10.1103/PhysRevLett.78.1771 · Physical Review Letters

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Abstract

The anomalous momentum and temperature dependence of the spectral lineshape in data from underdoped Bi2Sr2CaCu2O8+δ (Bi2212) indicates that the quasiparticles are strongly coupled to collective excitations centered near Q=(π,π). The doping dependence of the spectral lineshape and its correlation with the size of the superconducting gap indicate these collective excitations are related to the pairing interaction in high- Tc superconductors, in analogy with phonon induced structures in tunneling spectra of low Tc materials.

Source-reported materials — not catalogue approval

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.	84	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	80	Pressure not reported	unknown