4.6 Article

Finite band inversion of angular-resolved photoemission in Bi2Sr2CaCu2O8+δ and comparison with optics

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PHYSICAL REVIEW B
卷 77, 期 9, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.77.094524

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Using a maximum entropy technique within a finite band Eliashberg formalism, we extract from recent high accuracy nodal direction angular-resolved photoemission spectroscopy data in optimally doped Bi2Sr2CaCu2O8+delta (Bi2212) a quasiparticle electron-boson spectral density. Both normal and superconducting states with d-wave gap symmetry are treated. Finite and infinite band results are considered and contrasted. We compare with results obtained for the related transport spectral density, which follows from a similar inversion of optical data. We discuss the implication of our results for quasiparticle renormalizations in the antinodal direction.

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