Cascaded Built‐In Electric Fields Engineering for Electromagnetic Wave Absorption

ABSTRACT Built‐in electric fields (BIEF) at heterointerfaces create non‐equilibrium energy gradients that amplify dielectric response without sacrificing impedance matching, improving electromagnetic wave absorption (EWA). However, in cascaded BIEF systems formed by morphology control and multiphase hybridization, the impacts of dipole orientation and band‐edge connectivity on dielectric attenuation remain unclear. Herein, we synthesize two core–shell hybrids (metal@oxide@carbon and metal@multip