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Updated: Feb 27, 2026
05:20
Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
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Thermal transport in monolayer InSe
Arun S Nissimagoudar1,2, Jinlong Ma1,2, Yani Chen1,2
1Institute for Advanced Study, Shenzhen University, Shenzhen 518060, People's Republic of China.
Summary
Lattice thermal conductivity (κ) in two-dimensional Indium Selenide (InSe) is isotropic and approximately 27.6 W m⁻¹ K⁻¹ at room temperature. This property may limit nanoelectronic applications, as κ significantly decreases with smaller sample sizes.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional Indium Selenide (InSe) is a semiconductor with a moderate band gap, noted for its high electron mobility and photo-responsivity.
- Its potential in nanoelectronics is significant, but thermal properties require thorough investigation.
Purpose of the Study:
- To computationally determine the lattice thermal conductivity (κ) of monolayer InSe.
- To analyze the size-dependent behavior of κ and its implications for nanoelectronic applications.
Main Methods:
- Solving the phonon Boltzmann transport equation (BTE).
- Utilizing first-principles calculations for interatomic force constants.
- Investigating the in-plane thermal conductivity of monolayer InSe.
Main Results:
- The lattice thermal conductivity (κ) of monolayer InSe is isotropic, measuring approximately 27.6 W m⁻¹ K⁻¹ at room temperature.
- A significant size effect on κ was observed, persisting up to 20 μm.
- κ can be reduced by half by decreasing the sample size to 300 nm.
Conclusions:
- The calculated lattice thermal conductivity of monolayer InSe is relatively low.
- The pronounced size dependence of κ suggests it could be a limiting factor for InSe-based nanoelectronic devices.
- Further research into thermal management strategies for InSe nanostructures is warranted.
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