Cross-plane Seebeck coefficient of ErAs:InGaAs/InGaAlAs superlattices

Gehong Zeng, Joshua M.O. Zide, Woochul Kim, John E. Bowers, Arthur C. Gossard, Zhixi Bian, Yan Zhang, Ali Shakouri, Suzanne L. Singer, Arun Majumdar

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

We characterize cross-plane and in-plane Seebeck coefficients for ErAs:InGaAsInGaAlAs superlattices with different carrier concentrations using test patterns integrated with microheaters. The microheater creates a local temperature difference, and the cross-plane Seebeck coefficients of the superlattices are determined by a combination of experimental measurements and finite element simulations. The cross-plane Seebeck coefficients are compared to the in-plane Seebeck coefficients and a significant increase in the cross-plane Seebeck coefficient over the in-plane Seebeck coefficient is observed. Differences between cross-plane and in-plane Seebeck coefficients decrease as the carrier concentration increases, which is indicative of heterostructure thermionic emission in the cross-plane direction.

Original languageEnglish
Article number034502
JournalJournal of Applied Physics
Volume101
Issue number3
DOIs
Publication statusPublished - 2007

Bibliographical note

Funding Information:
The authors acknowledge useful discussions with Dr. Mihal Gross. This work is supported by the Office of Naval Research Thermionic Energy Conversion Center MURI.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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