DOI: 10.1063/1.3567111. Full dispersion versus Debye model evaluation of lattice thermal conductivity with a Landauer approach

Full dispersion versus Debye model evaluation of lattice thermal conductivity with a Landauer approach

10.1063/1.3567111

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

Using a full dispersion description of phonons, the thermal conductivities of bulk Si and Bi2Te3 are evaluated using a Landauer approach and related to the conventional approach based on the Boltzmann transport equation. A procedure to extract a well-defined average phonon mean-free-path from the measured thermal conductivity and given phonon-dispersion is presented. The extracted mean-free-path has strong physical significance and differs greatly from simple estimates. The use of simplified dispersion models for phonons is discussed, and it is shown that two different Debye temperatures must be used to treat the specific heat and thermal conductivity (analogous to the two different effective masses needed to describe the electron density and conductivity). A simple technique to extract these two Debye temperatures is presented and the limitations of the method are discussed.

Bibliography

Jeong, C., Datta, S., & Lundstrom, M. (2011). Full dispersion versus Debye model evaluation of lattice thermal conductivity with a Landauer approach. Journal of Applied Physics, 109(7).

Authors 3

Changwook Jeong (first)
Supriyo Datta (additional)
Mark Lundstrom (additional)

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Dates

Type	When
Created	14 years, 4 months ago (April 8, 2011, 8:45 p.m.)
Deposited	2 years ago (July 31, 2023, 8:01 p.m.)
Indexed	4 weeks, 1 day ago (July 30, 2025, 6:56 a.m.)
Issued	14 years, 4 months ago (April 1, 2011)
Published	14 years, 4 months ago (April 1, 2011)
Published Online	14 years, 4 months ago (April 8, 2011)
Published Print	14 years, 4 months ago (April 1, 2011)

Funders 0

None

BibTeX

@article{Jeong_2011, title={Full dispersion versus Debye model evaluation of lattice thermal conductivity with a Landauer approach}, volume={109}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.3567111}, DOI={10.1063/1.3567111}, number={7}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Jeong, Changwook and Datta, Supriyo and Lundstrom, Mark}, year={2011}, month=apr }

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