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Demonstration of electron filtering to increase the Seebeck coefficient in ErAs:InGaAs/InGaAlAs superlattices

J. M. O. Zide·D. Vashaee·G. Zeng·J. E. Bowers·A. Shakouri·A. C. Gossard
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Abstract

In this letter, we explore electron filtering as a technique to increase Seebeck coefficient and the thermoelectric power factor of heterostructured materials over that of the bulk. We present a theoretical model in which Seebeck coefficient and the power factor can be increased in an InGaAs based composite material. Experimental measurements of the cross-plane Seebeck coefficient are presented and confirm the importance of the electron filtering technique to decouple the electrical conductivity and Seebeck coefficient to increase the thermoelectric power factor.

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J. M. O. Zide, D. Vashaee, G. Zeng, J. E. Bowers, A. Shakouri, A. C. Gossard. 2005-10-18. Demonstration of electron filtering to increase the Seebeck coefficient in ErAs:InGaAs/InGaAlAs superlattices. https://arxiv.org/abs/cond-mat/0510490

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