Dynamical Particle Hole Asymmetry in Cuprate Superconductors

Abstract

Motivated by the form of recent theoretical results, a quantitative test for an important dynamical particle hole asymmetry of the electron spectral function at low energies and long wavelengths is proposed. The test requires the decomposition of the angle resolved photo emission intensity, after a specific Fermi symmetrization, into odd and even parts to obtain their ratio $\mathcal{R}$. A large magnitude $\mathcal{R}$ is implied in recent theoretical fits at optimal doping around the chemical potential, and I propose that this large asymmetry needs to be checked more directly and thoroughly. This processing requires a slightly higher precision determination of the Fermi momentum relative to current availability.

11 pages, 3 figures, updated figures and text. To appear in Physical Review Letters, Vol 109, August 10, 2012

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