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

doi:10.1063/1.4714541

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

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10 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 language	English (US)
Pages (from-to)	193110
Journal	Applied Physics Letters
Volume	100
Issue number	19
DOIs	https://doi.org/10.1063/1.4714541
State	Published - May 12 2012

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KAUST Repository Item: Exported on 2020-10-01

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4714541

https://repository.kaust.edu.sa/bitstream/10754/314528/1/Anomalous%20enhancement%20of%20the%20thermoelectric%20figure%20of%20merit%20by%20V%20co-doping%20of%20Nb-SrTiO3.pdf

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title = "Anomalous enhancement of the thermoelectric figure of merit by V co-doping of Nb-SrTiO3",

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.",

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T1 - Anomalous enhancement of the thermoelectric figure of merit by V co-doping of Nb-SrTiO3

AU - Ozdogan, K.

AU - Alshareef, Husam N.

AU - Schwingenschlögl, Udo

AU - Upadhyay Kahaly, M.

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2012/5/12

Y1 - 2012/5/12

N2 - 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.

AB - 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.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

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

Abstract

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