In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe<sub>2</sub>: Fid-Bau Portal

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In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe₂

Lijie Chen / Weitao Zhang / Hanlin Zhang / Jiawang Chen / Chaoyang Tan / Shiqi Yin / Gang Li / Yu Zhang / Penglai Gong / Liang Li

Low-symmetry two-dimensional (2D) materials have exhibited novel anisotropic properties in optics, electronics, and mechanics. Such characteristics have opened up new avenues for fundamental research on nano-electronic devices. In-plane thermal conductivity plays a pivotal role in the electronic performance of devices. This article reports a systematic study of the in-plane anisotropic thermal conductivity of PdSe₂ with a pentagonal, low-symmetry structure. An in-plane anisotropic ratio up to 1.42 was observed by the micro-Raman thermometry method. In the Raman scattering spectrum, we extracted a frequency shift from the $A_{g}^{3}$ mode with the most sensitivity to temperature. The anisotropic thermal conductivity was deduced by analyzing the heat diffusion equations of suspended PdSe₂ films. With the increase in thickness, the anisotropy ratio decreased gradually because the thermal conductivity in the x-direction increased faster than in the y-direction. The anisotropic thermal conductivity provides thermal management strategies for the next generation of nano-electronic devices based on PdSe₂.

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In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe₂

Lijie Chen / Weitao Zhang / Hanlin Zhang / Jiawang Chen / Chaoyang Tan / Shiqi Yin / Gang Li / Yu Zhang / Penglai Gong / Liang Li

Low-symmetry two-dimensional (2D) materials have exhibited novel anisotropic properties in optics, electronics, and mechanics. Such characteristics have opened up new avenues for fundamental research on nano-electronic devices. In-plane thermal conductivity plays a pivotal role in the electronic performance of devices. This article reports a systematic study of the in-plane anisotropic thermal conductivity of PdSe₂ with a pentagonal, low-symmetry structure. An in-plane anisotropic ratio up to 1.42 was observed by the micro-Raman thermometry method. In the Raman scattering spectrum, we extracted a frequency shift from the $A_{g}^{3}$ mode with the most sensitivity to temperature. The anisotropic thermal conductivity was deduced by analyzing the heat diffusion equations of suspended PdSe₂ films. With the increase in thickness, the anisotropy ratio decreased gradually because the thermal conductivity in the x-direction increased faster than in the y-direction. The anisotropic thermal conductivity provides thermal management strategies for the next generation of nano-electronic devices based on PdSe₂.

In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe₂

Lijie Chen / Weitao Zhang / Hanlin Zhang / Jiawang Chen / Chaoyang Tan / Shiqi Yin / Gang Li / Yu Zhang / Penglai Gong / Liang Li

Low-symmetry two-dimensional (2D) materials have exhibited novel anisotropic properties in optics, electronics, and mechanics. Such characteristics have opened up new avenues for fundamental research on nano-electronic devices. In-plane thermal conductivity plays a pivotal role in the electronic performance of devices. This article reports a systematic study of the in-plane anisotropic thermal conductivity of PdSe₂ with a pentagonal, low-symmetry structure. An in-plane anisotropic ratio up to 1.42 was observed by the micro-Raman thermometry method. In the Raman scattering spectrum, we extracted a frequency shift from the $A_{g}^{3}$ mode with the most sensitivity to temperature. The anisotropic thermal conductivity was deduced by analyzing the heat diffusion equations of suspended PdSe₂ films. With the increase in thickness, the anisotropy ratio decreased gradually because the thermal conductivity in the x-direction increased faster than in the y-direction. The anisotropic thermal conductivity provides thermal management strategies for the next generation of nano-electronic devices based on PdSe₂.

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Title:

In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe₂

Contributors:

Lijie Chen (author) / Weitao Zhang (author) / Hanlin Zhang (author) / Jiawang Chen (author) / Chaoyang Tan (author) / Shiqi Yin (author) / Gang Li (author) / Yu Zhang (author) / Penglai Gong (author) / Liang Li (author)

Published in:

Sustainability, Vol 13, Iss 8, p 4155 (2021)

Publication date:

2021

ISSN:

DOI:

https://doi.org/10.3390/su13084155

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Keywords:

PdSe<sub>2</sub> , thermal conductivity , Raman spectrum , Environmental effects of industries and plants , TD194-195 , Renewable energy sources , TJ807-830 , Environmental sciences , GE1-350

Metadata by DOAJ is licensed under CC BY-SA 1.0

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