Buckley, D, Kudrynskyi, Z, Nilanthy, B, Vincent, T, Mazumder, D, Castanon, E, Kovalyuk, Z, Kolosov, O, Kazakova, O, Tzalenchuk, A, Patanè, A and Balakrishnan, N (2021) Anomalous Low Thermal Conductivity of Atomically Thin InSe Probed by Scanning Thermal Microscopy. Advanced Functional Materials. ISSN 1616-301X

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The ability of a material to conduct heat influences many physical phenomena, ranging from thermal management in nanoscale devices to thermoelectrics. Van der Waals two dimensional (2D) materials offer a versatile platform to tailor heat transfer due to their high surface-to-volume ratio and mechanical flexibility. Here, the nanoscale thermal properties of 2D indium selenide (InSe) are studied by scanning thermal microscopy. The high electrical conductivity, broad-band optical absorption and mechanical flexibility of 2D InSe are accompanied by an anomalous low thermal conductivity (). This can be smaller than that of low- dielectrics, such as silicon oxide, and it decreases with reducing the lateral size and/or thickness of InSe. The thermal response is probed in free-standing InSe layers as well as layers supported by a substrate, revealing the role of interfacial thermal resistance, phonon scattering, and strain. These thermal properties are critical for future emerging technologies, such as field effect transistors that require efficient heat dissipation or thermoelectric energy conversion with low-, high electron mobility 2D materials, such as InSe.

Item Type: Article
Additional Information: The final version of this article and all relevant information related to it can be found online at; https://onlinelibrary.wiley.com/doi/10.1002/adfm.202008967
Uncontrolled Keywords: 2D semiconductors, InSe, phonons, scanning thermal microscopy, thermal conductivity
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
T Technology > TP Chemical technology
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 01 Feb 2021 12:49
Last Modified: 12 Jan 2022 01:30
URI: https://eprints.keele.ac.uk/id/eprint/9082

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