Anomalous enhancement of the thermoelectric figure of merit by V co-doping of Nb-SrTiO3

K. Ozdogan, Husam N. Alshareef, Udo Schwingenschlögl, M. Upadhyay Kahaly

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The 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.
Original languageEnglish (US)
Pages (from-to)193110
JournalApplied Physics Letters
Volume100
Issue number19
DOIs
StatePublished - May 12 2012

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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