Enhanced tendency towards d-wave pairing and antiferromagnetism in a doped staggered periodic Anderson model

摘要

Whether or not a physical property can be enhanced in an inhomogeneous system compared with its homogeneous counterpart is an intriguing fundamental question. We provide a concrete example with a positive answer by uncovering a remarkable enhancement of both the antiferromagnetic structure factor and d-wave pairing tendency in a doped staggered periodic Anderson model (PAM) with two alternating inequivalent local moments. The common thread in these enhancements is found to originate from the generic "self-averaging" effect and nonmonotonic dependence of the corresponding physical quantity in homogeneous PAM. More strikingly, we provided evidence of the coexistence of these two enhancements via a tentative phase diagram. Our findings may imply the plausible generalization of enhancing physical properties in generic inhomogeneous systems.