Fig. 3: Entropy considerations in the event of a specific heat peak anomaly.
From: Large composite fermion effective mass at filling factor 5/2
The C/T versus T data are shown at ν = 5/2 (exact filling) with the same symbol convention as in the upper panel of Fig. 2, except for the red shaded area denoting the area above and below the CF Fermi liquid value if m* = me. The vertical dashed line marks the temperature at which a sharp decrease in C/T should have occurred for the entropy to recover the CF Fermi liquid value for m* = me. The data show no evidence for a large specific heat peak decrease or jump, and should it occur at higher temperatures, constraints from the third law of thermodynamics would imply that the CF effective mass m* is larger than the bare electron mass, me. The data and error bars of C/T are the same as in Fig. 2.
