Anomalous enhancement of the thermoelectric figure of merit by V co-doping of Nb-SrTiO3
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Computational Physics and Materials Science (CPMS)
Functional Nanomaterials and Devices Research Group
Materials Science and Engineering Program
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AbstractThe effect of V co-doping of Nb-SrTiO3 is studied by full-potential density functional theory. We obtain a stronger increase of the carrier density for V than for Nbdopants. While in Nb-SrTiO3 a high carrier density counteracts a high thermoelectric figure of merit, the trend is inverted by V co-doping. The mechanism leading to this behavior is explained in terms of a local spin-polarization introduced by the V ions. Our results indicate that magnetic co-doping can be a prominent tool for improving the thermoelectric figure of merit.
CitationOzdogan K, Upadhyay Kahaly M, Alshareef HN, Schwingenschlögl U (2012) Anomalous enhancement of the thermoelectric figure of merit by V co-doping of Nb-SrTiO3. Appl Phys Lett 100: 193110. doi:10.1063/1.4714541.
JournalApplied Physics Letters