Giant Sommerfeld coefficient in the heavy-fermion YbBiPt
Abstract
Description
It 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 figure
3 pages in RevTex, no figure