  Heavy fermion compounds consisting of two or more inequivalent local moment
sites per unit cell have been a promising platform of investigating the
interplay between distinct Kondo screenings that is absent in the conventional
systems containing only one rare-earth ion per unit cell. We report a
remarkable enhancement of the antiferromagnetic (AF) ordering tendency in the
staggered periodic Anderson model (PAM) with two alternating inequivalent local
moments if their hybridization strengths reside in the Kondo singlet and
antiferromagnetic insulator regime separately of the phase diagram of
homogeneous PAM. Our results uncover the rich physics induced by the interplay
of multiple energy scales in the staggered PAM and furthermore implies the
ubiquitous existence of the enhancement of physical quantities in general
inhomogeneous systems.
