TY - JOUR

T1 - Anomalous Low Thermal Conductivity of Atomically Thin InSe Probed by Scanning Thermal Microscopy

AU - Buckley, David

AU - Kudrynskyi, Zakhar

AU - Balakrishnan, Nilanthy

AU - Vincent, Tom

AU - Mazumder, Debarati

AU - Castanon, Eli

AU - Kovalyuk, Zakhar

AU - Kolosov, Oleg

AU - Kazakova, Olga

AU - Tzalenchuk, A.

AU - Patane, Amalia

N1 - This is the peer reviewed version of the following article:Buckley, D., Kudrynskyi, Z. R., Balakrishnan, N., Vincent, T., Mazumder, D., Castanon, E., Kovalyuk, Z. D., Kolosov, O., Kazakova, O., Tzalenchuk, A., Patanè, A., Anomalous Low Thermal Conductivity of Atomically Thin InSe Probed by Scanning Thermal Microscopy. Adv. Funct. Mater. 2021, 2008967. https://doi.org/10.1002/adfm.202008967 which has been published in final form at https://onlinelibrary.wiley.com/doi/10.1002/adfm.202008967 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

PY - 2021/3/10

Y1 - 2021/3/10

N2 - The ability of a material to conduct heat influences many physical phenomena, ranging from thermal management in nanoscale devices to thermoelectrics. Van der Waals 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 (κ). This can be smaller than that of low-κ 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-κ, high electron mobility 2D materials, such as InSe.

AB - The ability of a material to conduct heat influences many physical phenomena, ranging from thermal management in nanoscale devices to thermoelectrics. Van der Waals 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 (κ). This can be smaller than that of low-κ 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-κ, high electron mobility 2D materials, such as InSe.

KW - InSe

KW - SThM

KW - scanning thermal microscopy

KW - nanotermal

KW - nanoscale heat transport

KW - anistotropy

KW - heat transport

KW - 2D materials

KW - vdW materials

KW - TMD

U2 - 10.1002/adfm.202008967

DO - 10.1002/adfm.202008967

M3 - Journal article

VL - 31

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 11

M1 - 2008967

ER -