The Arpes Experiment and the Gap Symmetry: How Far Can We Determine the Gap Symmetry Really?

Abstract

In this contribution, the peak position of the spectral function in the ARPES spectrum has been calculated for several gap symmetries and electronic band structures. As a result, the d–wave, s + id and s* + id symmetries appear to be consistent with ARPES results. An additional comparison with previous calculations of the specific heat in normal and superconducting states as well as the single particle tunnelling current, reveals the existence of two characteristic temperatures, intrinsically associated with the Van Hove Singularity.