Cited by 239Transition Metal Oxide NanomaterialsThermal properties of materialsThermography and Photoacoustic Techniques

Thermal conductivity and dynamic heat capacity across the metal-insulator transition in thin film VO2

Oh, Dong-Wook, Ko, Changhyun, Ramanathan, Shriram, Cahill, David G.·2010·Applied Physics Letters

Abstract

The thermal properties of VO2 thin films, 90–440 nm thick, are measured by time-domain thermoreflectance (TDTR) across the metal-insulator transition (MIT). The thermal conductivity increases by as much as 60% in the metallic phase; this increase in conductivity is in good agreement with the expected electronic contribution to the thermal conductivity. For relatively thick layers, TDTR data are sensitive to the dynamic heat capacity and show a pronounced peak near the MIT temperature created by a contribution to the enthalpy from periodic transformations at the 10 MHz frequency of the thermal waves used in the experiment. The dynamic heat capacity increases as the amplitude ΔT of the thermal waves becomes comparable to the width of the MIT and reaches ≈30% of the bulk latent heat for ΔT≈1.6 K.

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Crossref · 10.1063/1.3394016

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  • Over the past two decades, TDTR has emerged and evolved as a reliable, powerful, and versatile technique to measure thermal properties of a wide range of bulk and thin film materials and their interfaces.

    “Over the past two decades, ultrafast laser-based time-domain thermoreflectance (TDTR) has emerged and evolved as a reliable, powerful, and versatile technique to measure the thermal properties of a wide range of bulk and thin film materials and their interfaces.”

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Authors
Oh, D.-W., Ko, C., Ramanathan, S., & Cahill, D. G.
Affiliations
  • University of Illinois Urbana-Champaign (US)
  • Harvard University (US)
Venue
Applied Physics Letters
Published
2010-04-12
Volume
96
Issue
15
ISSN
  • 0003-6951 (ISSN-L)
  • 1077-3118
OpenAlex
W2011656361
Cited by
239
References
18
Citations by year
2026: 12 · 2025: 25 · 2024: 19 · 2023: 18 · 2022: 14 · 2021: 19 · 2020: 19 · 2019: 19 · 2018: 19 · 2017: 17 · 2016: 9 · 2015: 14 · 2014: 10 · 2013: 8 · 2012: 7
FWCI
6.62
Type
journal article
Language
en
Open access
closed
Locations
Applied Physics Letters (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Transition Metal Oxide Nanomaterials
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Engineering › Mechanics of Materials › Thermography and Photoacoustic Techniques
Keywords
vanadium dioxide, metal-insulator transition, thin films, thermal conductivity, dynamic heat capacity, time-domain thermoreflectance, electronic thermal conductivity, latent heat, phase transformation

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