Crossref journal-article
AIP Publishing
Applied Physics Letters (317)
Abstract

We present a first-principles study of the cross-plane thermal conductivity κ⊥ in a wide variety of semiconductor thin films. We introduce a simple suppression model that matches variance-reduced Monte Carlo simulations with ab-initio phonon dispersions and scattering rates within ≤5% even for anisotropic compounds. This, in turn, enables accurate κ⊥ reconstruction from tabulated cumulative conductivity curves κΣ(Λ⊥). We furthermore reveal, and explain, a distinct quasiballistic regime characterised by a fractional thickness dependence κ⊥∼L2−α in alloys (where α is the Lévy exponent) and logarithmic dependence κ⊥∼ln(L) in single crystals. These observations culminate in the formulation of two compact parametric forms for κ⊥(L) that can fit the first-principles curves across the entire ballistic-diffusive range within a few percent for all investigated compounds.

Bibliography

Vermeersch, B., Carrete, J., & Mingo, N. (2016). Cross-plane heat conduction in thin films with ab-initio phonon dispersions and scattering rates. Applied Physics Letters, 108(19).

Authors 3
  1. Bjorn Vermeersch (first)
  2. Jesús Carrete (additional)
  3. Natalio Mingo (additional)
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Dates
Type When
Created 9 years, 3 months ago (May 9, 2016, 1 p.m.)
Deposited 2 years, 2 months ago (June 17, 2023, 11:19 a.m.)
Indexed 34 minutes ago (Aug. 30, 2025, 7:20 a.m.)
Issued 9 years, 3 months ago (May 9, 2016)
Published 9 years, 3 months ago (May 9, 2016)
Published Online 9 years, 3 months ago (May 9, 2016)
Published Print 9 years, 3 months ago (May 9, 2016)
Funders 1
  1. European Commission 10.13039/501100000780

    Region: Europe

    gov (National government)

    Labels26
    1. European Union
    2. Comisión Europea
    3. Europäische Kommission
    4. EU-Kommissionen
    5. Euroopa Komisjoni
    6. Ευρωπαϊκής Επιτροπής
    7. Европейската комисия
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    9. Commission européenne
    10. Choimisiúin Eorpaigh
    11. Europskoj komisiji
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    22. Evropski komisiji
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    Awards1
    1. 645776

@article{Vermeersch_2016, title={Cross-plane heat conduction in thin films with ab-initio phonon dispersions and scattering rates}, volume={108}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.4948968}, DOI={10.1063/1.4948968}, number={19}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Vermeersch, Bjorn and Carrete, Jesús and Mingo, Natalio}, year={2016}, month=may }