Cobalt‐Induced Strong Anharmonicity Coupled With Hierarchical Defect and Band Structure Engineering for Enhanced n‐ and p‐Type Thermoelectric Performance in ZrFe0.5Ni0.5Sb Double Half‐Heuslers. - Kahiu, Joseph Ngugi; Shin, Donghyun; Kihoi, Samuel Kimani; Abbey, Stanley; Okirigiti, Momanyi Amos; Shenoy, U. Sandhya; Bhat, D. Krishna; Oh, Min‐Wook; Park, Kwi‐Il; Lee, Ho Seong (Small Structures, 2026)