2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/169698We investigate the subarea law scaling properties of the block entropy in bipartite fermionic systems which do not have a finite Fermi surface. It is found that in gapped regimes the leading subarea term is a negative constant, whereas in critical regimes with point nodes the leading subarea law is a logarithmic additive term. At the phase boundary that separates the critical and non-critical regimes, the subarea scaling shows power-law behavior.4 pages,4 figures; published versionStrongly Correlated ElectronsStatistical MechanicsQuantum Physicstext