Ultralow Thermal Conductivity in Disordered, Layered WSe 2 Crystals
Abstract
The cross-plane thermal conductivity of thin films of WSe 2 grown from alternating W and Se layers is as small as 0.05 watts per meter per degree kelvin at room temperature, 30 times smaller than the c -axis thermal conductivity of single-crystal WSe 2 and a factor of 6 smaller than the predicted minimum thermal conductivity for this material. We attribute the ultralow thermal conductivity of these disordered, layered crystals to the localization of lattice vibrations induced by the random stacking of two-dimensional crystalline WSe 2 sheets. Disordering of the layered structure by ion bombardment increases the thermal conductivity.
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TDTR has been applied to measure materials with thermal conductivity values ranging from about 2000 W m−1 K−1 (e.g., diamond and graphite) to as low as 0.03 W m−1 K−1 (e.g., disordered WSe2 films).
“In particular, time-domain thermoreflectance (TDTR) technique has been applied for measuring materials with thermal conductivity values ranging from a high end at ~2000 W m -1 K -1 (like diamond 36 and graphite 24, 37 ) to as low as 0.03 W m -1 K -1 (e.g., disordered WSe2 films 26 ).”
From Tutorial: Time-domain thermoreflectance (TDTR) for thermal property characterization of bulk and thin film materials (2018) · cites this paper as [26]
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.”
From Tutorial: Time-domain thermoreflectance (TDTR) for thermal property characterization of bulk and thin film materials (2018) · cites this paper as [26]
Ultra-low thermal conductivities of full-dense solid materials were reported for fullerene derivatives at room temperature (~0.05 W m-1 K-1) and disordered layered WSe2 thin films at cryogenic temperatures (~0.03 W m-1 K-1), both measured using TDTR.
“Ultra-low thermal conductivities of full-dense solid materials were reported for fullerene derivatives at room temperature (~0.05 W m -1 K -1 ) 125 and disordered layered WSe2 thin films at cryogenic temperatures (~0.03 W m -1 K -1 ) 26 , both measured using TDTR.”
From Tutorial: Time-domain thermoreflectance (TDTR) for thermal property characterization of bulk and thin film materials (2018) · cites this paper as [26]
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- Authors
- Chiritescu, C., Cahill, D. G., Nguyen, N., Johnson, D., Bodapati, A., Keblinski, P., & Zschack, P.
- Affiliations
- Argonne National Laboratory (US)
- Venue
- Science
- Published
- 2007-01-19
- Volume
- 315
- Issue
- 5810
- Pages
- 351-353
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1963728435
- Cited by
- 854
- References
- 2
- Citations by year
- 2026: 26 · 2025: 39 · 2024: 48 · 2023: 42 · 2022: 56 · 2021: 43 · 2020: 54 · 2019: 53 · 2018: 67 · 2017: 58 · 2016: 69 · 2015: 59 · 2014: 44 · 2013: 39 · 2012: 39
- FWCI
- 11.80
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
- Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
- Physical Sciences › Engineering › Civil and Structural Engineering › Thermal Radiation and Cooling Technologies
- Keywords
- WSe2, through-plane thermal conductivity, ultralow thermal conductivity, two-dimensional materials, ion bombardment, stacking disorder, transition metal dichalcogenides, thin films
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