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Cited by 50Thermal properties of materialsMetal and Thin Film MechanicsAdvanced Thermoelectric Materials and Devices

Phonon and electron contributions to the thermal conductivity of VNx epitaxial layers

Zheng, Qiye, Mei, Antonio B., Tuteja, Mohit, Sangiovanni, Davide G., Hultman, Lars, Petrov, Ivan, Greene, J. E., Cahill, David G.·2017·Physical Review Materials
DOI 10.1103/physrevmaterials.1.065002
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Abstract

Thermal conductivities of $\mathrm{V}{\mathrm{N}}_{x}/\mathrm{MgO}$(001) ($0.76\ensuremath{\le}x\ensuremath{\le}1.00$) epitaxial layers, grown by reactive magnetron sputter deposition, are measured in the temperature range $300<T<1000\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ using time-domain thermoreflectance (TDTR). Data for the total thermal conductivity are compared to the electronic contribution to the thermal conductivity calculated from the measured electrical conductivity, the Wiedemann-Franz law, and an estimate of the temperature dependence of the Lorenz number $L$($T$). The total thermal conductivity is dominated by electron contribution and varies between $13\phantom{\rule{0.16em}{0ex}}\mathrm{W}\phantom{\rule{0.16em}{0ex}}{\mathrm{m}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$ at $x=0.76$ and $20\phantom{\rule{0.16em}{0ex}}\mathrm{W}\phantom{\rule{0.16em}{0ex}}{\mathrm{m}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$ at $x=1.00$ for $T=300\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ and between 25 and $35\phantom{\rule{0.16em}{0ex}}\mathrm{W}\phantom{\rule{0.16em}{0ex}}{\mathrm{m}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$ for $T=1000\phantom{\rule{0.16em}{0ex}}\mathrm{K}$. The lattice thermal conductivity vs $x$ ranges from 5 to $7\phantom{\rule{0.16em}{0ex}}\mathrm{W}\phantom{\rule{0.16em}{0ex}}{\mathrm{m}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$ at 300 K and decreases by 20% at 500 K. The low magnitude and weak temperature dependence of the lattice thermal conductivity are attributed to strong electron-phonon coupling in VN.

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  • Researchers are looking for alternative metal transducers for TDTR measurements at higher temperatures (with Pt and HfN as potential candidates) or attempting to perform TDTR measurements without metal transducers at high temperatures.

    “Researchers are looking for alternative metal transducers for TDTR measurements at higher temperatures (with Pt and HfN 229 as two examples of the potential candidates) or attempting to perform TDTR measurements without metal transducers at high temperatures. 142”

    From Tutorial: Time-domain thermoreflectance (TDTR) for thermal property characterization of bulk and thin film materials (2018) · cites this paper as [142]

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Authors
Zheng, Q., Mei, A. B., Tuteja, M., Sangiovanni, D. G., Hultman, L., Petrov, I., Greene, J. E., & Cahill, D. G.
Affiliations
  • University of Illinois Urbana-Champaign (US)
  • Linköping University (SE)
ORCID
Venue
Physical Review Materials
Publisher
American Physical Society (APS)
Published
2017-11-20
Volume
1
Issue
6
ISSN
2475-9953 (ISSN-L)
DOI
10.1103/physrevmaterials.1.065002
OpenAlex
W2769758651
Cited by
50
References
60
Citations by year
2026: 1 · 2025: 8 · 2024: 3 · 2023: 2 · 2022: 5 · 2021: 8 · 2020: 9 · 2019: 6 · 2018: 8
FWCI
2.66
Type
journal article
Language
en
Open access
closed
Licence
link.aps.org/licenses/aps-default-license (vor)
Locations
  • Physical Review Materials (publishedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Funders
Vetenskapsrådet (2009-00971, 2013-4018, 2014-5790)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Engineering › Mechanics of Materials › Metal and Thin Film Mechanics
  • Physical Sciences › Materials Science › Materials Chemistry › Advanced Thermoelectric Materials and Devices
Keywords
thermal conductivity, vanadium nitride, electronic thermal conductivity, lattice thermal conductivity, Lorenz number, Wiedemann-Franz law, MgO(001) substrate, time-domain thermoreflectance, nitridation, epitaxial growth

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