Low Thermal Conductivity and Interface Thermal Conductance in SnS2
arXiv:2111.08310 · doi:10.1103/PhysRevB.104.195304
Abstract
After the discovery of graphene, there have been tremendous efforts in exploring various layered two-dimensional (2D) materials for their potential applications in electronics, optoelectronics, as well as energy conversion and storage. One of such 2D materials, SnS2, which is earth abundant, low in toxicity, and cost effective, has been reported to show a high on/off current ratio, fast photodetection, and high optical absorption, thus making this material promising for device applications. Further, a few recent theoretical reports predict high electrical conductivity and Seebeck coefficient in its bulk counterparts. However, the thermal properties of SnS2 have not yet been properly explored, which are important to materialize many of its potential applications. Here, we report the thermal properties of SnS2 measured using the optothermal method and supported by density functional theory (DFT) calculations. Our experiments suggest very low in-plane lattice thermal conductivity (\k{appa} = 3.20 +- 0.57 W m-1 K-1) and cross-plane interfacial thermal conductance per unit area (g = 0.53 +- 0.09 MW m-2 K-1) for monolayer SnS2 supported on a SiO2/Si substrate. The thermal properties show a dependence on the thickness of the SnS2 flake. Based on the findings of our DFT calculations, the very low value of the lattice thermal conductivity can be attributed to low group velocity, a shorter lifetime of the phonons, and strong anharmonicity in the crystal. Materials with low thermal conductivity are important for thermoelectric applications as the thermoelectric power coefficient goes inversely with the thermal conductivity.
References in corpus (25)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Atomically thin MoS2: A new direct-gap semiconductor
- Thermal Properties of Graphene, Carbon Nanotubes and Nanostructured Carbon Materials
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Distribution of phonon lifetime in Brillouin zone
- STM Spectroscopy of ultra-flat graphene on hexagonal boron nitride
- High-accuracy first-principles determination of the structural, vibrational and thermodynamical properties of diamond, graphite, and derivatives
- High thermal conductivity of high-quality monolayer boron nitride and its thermal expansion
- Anisotropic intrinsic lattice thermal conductivity of phosphorene from first principles
- Phonon Transport in Single-Layer Transition Metal Dichalcogenides: a First-Principles Study
- Layer-dependent properties of SnS2 and SnSe2 novel two-dimensional materials
- Phononic thermal properties of two-dimensional materials
- Phonon Transport in Graphene
- Absorption of Light by Excitons and Trions in Monolayers of Metal Dichalcogenide MoS: Experiments and Theory
- Substrate Coupling Suppresses Size Dependence of Thermal Conductivity in Supported Graphene
- A Revisit to High Thermoelectric Performance of Single-layer MoS2
- Temperature Dependent Thermal Boundary Conductance of Monolayer MoS by Raman Thermometry
- Superior thermal conductivity in suspended bilayer hexagonal boron nitride
- Outstanding Thermal Conductivity of Single Atomic Layer Isotope-Modified Boron Nitride
- Low-Frequency Raman Spectroscopy of Few-Layer 2H-SnS2
- Bilayer SnS: Easy-tunable Stacking Sequence by Charging and Loading Pressure
- Thermal conductivity and Lorenz ratio of metals at intermediate temperature: a first-principles analysis
- Hexagonal Boron Nitride-Graphene Heterostructures with Enhanced Interfacial Thermal Conductance for Thermal Management Applications
- Thickness-dependent Kapitza resistance in multilayered graphene and other two-dimensional crystals
- Group Theory analysis of phonons in two-dimensional Transition Metal Dichalcogenides