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

Research output: Contribution to journalArticle

76 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 languageEnglish
Article number242107
JournalApplied Physics Letters
Volume88
Issue number24
DOIs
Publication statusPublished - 2006 Jun 12

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superlattices
thermal conductivity
thermionic emission
electronics
conservation
momentum
nanoparticles
estimates
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Kim, W., Singer, S. L., Majumdar, A., Vashaee, D., Bian, Z., Shakouri, A., ... Gossard, A. C. (2006). Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices. Applied Physics Letters, 88(24), [242107]. https://doi.org/10.1063/1.2207829
Kim, Woochul ; Singer, Suzanne L. ; Majumdar, Arun ; Vashaee, Daryoosh ; Bian, Zhixi ; Shakouri, Ali ; Zeng, Gehong ; Bowers, John E. ; Zide, Joshua M.O. ; Gossard, Arthur C. / Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices. In: Applied Physics Letters. 2006 ; Vol. 88, No. 24.
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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.",
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Kim, W, Singer, SL, Majumdar, A, Vashaee, D, Bian, Z, Shakouri, A, Zeng, G, Bowers, JE, Zide, JMO & Gossard, AC 2006, 'Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices', Applied Physics Letters, vol. 88, no. 24, 242107. https://doi.org/10.1063/1.2207829

Cross-plane lattice and electronic thermal conductivities of ErAs:InGaAsInGaAlAs superlattices. / Kim, Woochul; Singer, Suzanne L.; Majumdar, Arun; Vashaee, Daryoosh; Bian, Zhixi; Shakouri, Ali; Zeng, Gehong; Bowers, John E.; Zide, Joshua M.O.; Gossard, Arthur C.

In: Applied Physics Letters, Vol. 88, No. 24, 242107, 12.06.2006.

Research output: Contribution to journalArticle

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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.

PY - 2006/6/12

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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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