Enhanced Charge Transport in Ca₂MnO₄-Layered Perovskites by Point Defect Engineering.

ABSTRACT: Coupling between thermal and charge transport in crystalline materials has always been one of the greatest challenges in understanding the underlying physics of thermoelectric materials. In this sense, CaO(CaMnO₃)_m Ruddlesden-Popper layered perovskites, comprising m perovskite subcells separated by CaO planes, exhibit intriguing thermal and electronic transport properties that can be tuned by altering their crystal periodicities. Applying the well-established phonon glass electron crystal (PGEC) concept enables us to increase the transparency of these CaO planes to electron transport at the same time while preserving their opacity to phonon transport. First-principles calculations indicate that the total local potential at CaO planes, where Y substitutes

SUBMITTER: Azulay A 

PROVIDER: S-EPMC7883997 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature