Anomalous dispersion in the autocorrelation of ARPES data of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$

Abstract

We find that peaks in the autocorrelation of angle resolved photoemission spectroscopy data of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ in the superconducting state show dispersive behavior for binding energies smaller than the maximum superconducting energy gap. For higher energies, though, a striking anomalous dispersion is observed that is a consequence of the interaction of the electrons with collective excitations. In contrast, in the pseudogap phase, we only observe dispersionless behavior for the autocorrelation peaks. The implications of our findings in regards to Fourier transformed scanning tunneling spectroscopy data are discussed.

5 pages, 4 figures

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• Electronic Structure of the Cuprate Superconducting and Pseudogap Phases from Spectroscopic Imaging STM
• Universal Disorder in Bi2Sr2CaCu2O8+x
• Resonant soft x-ray scattering, stripe order, and the electron spectral function in cuprates
• On the checkerboard pattern and the autocorrelation of photoemission data in high temperature superconductors
• The Three Component Electronic Structure of the Cuprates Derived from SI-STM
• Coupled electronic and magnetic excitations in the cuprates and their role in the superconducting transition
• Quasiparticle scattering interference in cuprate superconductors
• Electron pockets and pseudogap Dirac point in underdoped cuprate superconductors
• The k-space Origins of Scattering in Bi2Sr2CaCu2O8+x
• Impurity-Scattering Assisted Umklapp Scattering as the Origin of Low-Temperature Resistivity in the Normal-State of Cuprate Superconductors