Enhanced Charge Transport in Ca<sub>2</sub>MnO<sub>4</sub>-Layered Perovskites by Point Defect Engineering
Amram Azulay, Marwan Wahabi, Yuriy Natanzon, Yaron Kauffmann, Yaron Amouyal
Abstract
= 0.01, 0.05, 0.1, and 0.15) bulk materials in the range of 300-1000 K confirm that compounds doped with Y exhibit higher electrical conductivity values than their La-doped counterparts. We attribute this to lower polaron hopping energy values (up to 23%) evaluated using the small polaron hopping model. This study introduces an original way to employ the PGEC approach for thermoelectric oxides.
Topics & Concepts
PolaronMaterials scienceThermoelectric effectPerovskite (structure)Seebeck coefficientCondensed matter physicsThermoelectric materialsDopingThermal conductivityElectrical resistivity and conductivityPhononCoupling (piping)Charge (physics)ElectronCrystallographyThermodynamicsOptoelectronicsPhysicsChemistryQuantum mechanicsMetallurgyComposite materialAdvanced Thermoelectric Materials and DevicesThermal properties of materialsThermal Expansion and Ionic Conductivity