A new update to my first essay on the kink feature in the ARPES spectra of high-Tc superconductors. This time, it could throw a major wrench into the analysis done previously on this high-energy kink feature that has been seen around 500 meV. The new paper[1] disputes the idea that this high energy kink is intrinsic to the band dispersion of the material. Rather, they argued that it is an artifact of the momentum distribution curve (MDC) method. Their analysis of the energy distribution cureve (EDC) does not show the same effect for that energy range.
It would be interesting to see if the previous authors who have done the analysis on this high energy kink would respond to this paper.
Zz.
[1] W. Zhang et al., Phys. Rev. lett. v.101, p.017002 (2008).
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