The "states-non-conserving" fermion density of states (DOS), deduced from the specific heat of hole-doped cuprates, could arise from a Kondo or heavy fermion-like DOS being suppressed by anti-ferromagnetic spin fluctuations. The large Fermi surface predicted by band theory and observed experimentally, is still expected for zero pseudogap, but with an effective mass corresponding to a Kondo temperature ~ 800 K. A finite pseudogap could divide it into Fermi arcs. Theoretical results for the asymmetric Anderson model can account for the experimental Wilson ratio.
@article{arxiv.2108.02108,
title = {The pseudogap in hole-doped cuprates: possible insights from the Kondo effect},
author = {J. R. Cooper},
journal= {arXiv preprint arXiv:2108.02108},
year = {2022}
}