Local structural distortions and reduced thermal conductivity in Ge-substituted chalcopyrite
Sahil Tippireddy, Feridoon Azough, Vikram Vikram, Animesh Bhui, Philip A. Chater, Demie Kepaptsoglou, Quentin M. Ramasse, Robert Freer, Ricardo Grau‐Crespo, Kanishka Biswas, Paz Vaqueiro, Anthony V. Powell
Abstract
Pair-distribution-function analysis of X-ray total-scattering data for CuFe 1− x Ge x S 2 reveals a local structural distortion induced by the lone-pair of Ge 2+ . The resulting strain reduces thermal conductivity and improves thermoelectric performance.
Topics & Concepts
ChalcopyriteThermal conductivityThermoelectric effectPair distribution functionMaterials scienceLone pairScatteringDistortion (music)ThermalConductivityCondensed matter physicsThermoelectric materialsCrystallographyThermodynamicsOpticsChemistryComposite materialMathematicsCopperPhysicsOptoelectronicsMetallurgyMathematical analysisPhysical chemistryMoleculeQuantum mechanicsCMOSAmplifierAdvanced Thermoelectric Materials and DevicesChalcogenide Semiconductor Thin FilmsSemiconductor materials and interfaces