Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices

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

doi:10.1063/1.2207829

Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices

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

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

85 Citations (Scopus)

Abstract

We studied the cross-plane lattice and electronic thermal conductivities of superlattices made of InGaAlAs and InGaAs films, with the latter containing embedded ErAs nanoparticles (denoted as ErAs:InGaAs). Measurements of total thermal conductivity at four doping levels and a theoretical analysis were used to estimate the cross-plane electronic thermal conductivity of the superlattices. The results show that the lattice and electronic thermal conductivities have marginal dependence on doping levels. This suggests that there is lateral conservation of electronic momentum during thermionic emission in the superlattices, which limits the fraction of available electrons for thermionic emission, thereby affecting the performance of thermoelectric devices.

Original language	English
Article number	242107
Journal	Applied Physics Letters
Volume	88
Issue number	24
DOIs	https://doi.org/10.1063/1.2207829
Publication status	Published - 2006 Jun 12

Bibliographical note

Funding Information:
This work was supported by the Office of Naval Research (ONR) Multidisciplinary University Research Initiative (MURI) Grant with Dr. Mihal E. Gross as a project manager.

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2207829

Cite this

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title = "Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices",

abstract = "We studied the cross-plane lattice and electronic thermal conductivities of superlattices made of InGaAlAs and InGaAs films, with the latter containing embedded ErAs nanoparticles (denoted as ErAs:InGaAs). Measurements of total thermal conductivity at four doping levels and a theoretical analysis were used to estimate the cross-plane electronic thermal conductivity of the superlattices. The results show that the lattice and electronic thermal conductivities have marginal dependence on doping levels. This suggests that there is lateral conservation of electronic momentum during thermionic emission in the superlattices, which limits the fraction of available electrons for thermionic emission, thereby affecting the performance of thermoelectric devices.",

author = "Woochul Kim and Singer, {Suzanne L.} and Arun Majumdar and Daryoosh Vashaee and Zhixi Bian and Ali Shakouri and Gehong Zeng and Bowers, {John E.} and Zide, {Joshua M.O.} and Gossard, {Arthur C.}",

note = "Funding Information: This work was supported by the Office of Naval Research (ONR) Multidisciplinary University Research Initiative (MURI) Grant with Dr. Mihal E. Gross as a project manager. ",

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doi = "10.1063/1.2207829",

language = "English",

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journal = "Applied Physics Letters",

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T1 - Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices

AU - Kim, Woochul

AU - Singer, Suzanne L.

AU - Majumdar, Arun

AU - Vashaee, Daryoosh

AU - Bian, Zhixi

AU - Shakouri, Ali

AU - Zeng, Gehong

AU - Bowers, John E.

AU - Zide, Joshua M.O.

AU - Gossard, Arthur C.

N1 - Funding Information: This work was supported by the Office of Naval Research (ONR) Multidisciplinary University Research Initiative (MURI) Grant with Dr. Mihal E. Gross as a project manager.

PY - 2006/6/12

Y1 - 2006/6/12

N2 - We studied the cross-plane lattice and electronic thermal conductivities of superlattices made of InGaAlAs and InGaAs films, with the latter containing embedded ErAs nanoparticles (denoted as ErAs:InGaAs). Measurements of total thermal conductivity at four doping levels and a theoretical analysis were used to estimate the cross-plane electronic thermal conductivity of the superlattices. The results show that the lattice and electronic thermal conductivities have marginal dependence on doping levels. This suggests that there is lateral conservation of electronic momentum during thermionic emission in the superlattices, which limits the fraction of available electrons for thermionic emission, thereby affecting the performance of thermoelectric devices.

AB - We studied the cross-plane lattice and electronic thermal conductivities of superlattices made of InGaAlAs and InGaAs films, with the latter containing embedded ErAs nanoparticles (denoted as ErAs:InGaAs). Measurements of total thermal conductivity at four doping levels and a theoretical analysis were used to estimate the cross-plane electronic thermal conductivity of the superlattices. The results show that the lattice and electronic thermal conductivities have marginal dependence on doping levels. This suggests that there is lateral conservation of electronic momentum during thermionic emission in the superlattices, which limits the fraction of available electrons for thermionic emission, thereby affecting the performance of thermoelectric devices.

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Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices

Abstract

Bibliographical note

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