2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/170918It has been derived that the Sommerfeld coefficient $γ$ as large as 25 J/K$^2$mol can be theoretically accounted for provided the charge f-electron fluctuations are substantially suppressed. This result enables the understanding of the heavy-fermion YbBiPt ($γ$ =8 J/K$^2$mol) as the spin fluctuator and should stimulate the experimental specific-heat research at low temperatures.3 pages in RevTex, no figureStrongly Correlated Electronstext