Finite band inversion of ARPES in Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ in comparison with optics

Details Finite band inversion of ARPES in Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ in comparison with optics Finite band inversion of ARPES in Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ in comparison with optics

2008-03-03

arxiv.org/abs/0803.0203v1

Phys. Rev. B 77, 094524 (2008)

Physics

Condensed Matter

Superconductivity

9 pages, 7 figures submitted to Physical Review B

Scientific paper

10.1103/PhysRevB.77.094524

Using a maximum entropy technique within a finite band Eliashberg formalism we extract from recent high accuracy nodal direction angular resolved photo-emission spectroscopy (ARPES) data in optimally doped Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ (Bi2212) a quasiparticle electron-boson spectral density. Both normal and superconducting state 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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