Since I last completed the essay on the "kink" that is observed in ARPES spectrum of high-Tc superconductors, I've made 2 updates on the list of references. There have been 2 preprints appearing on arXiv that argued for the phonon origin of this kink. It there does not seem to be any end to this issue in sight, at least for now.
I wonder how the ARPES spectrum for the FeAs-based superconductors are going to look at. I bet many people are scurrying to be the first to report on that, assuming of course that one has a sizable single-crystal sample that can be easily cleaved in vacuum.
Zz.
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