少层PdSe2中的工程声子热输运

IF 6.5 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Meilin Li, Huanhuan Sun, Jun Zhou, Yunshan Zhao
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引用次数: 0

摘要

低维材料中的工程声子输运不仅对基础研究,而且对电子器件的热管理应用具有重要意义。然而,由于微纳加工和表征技术的困难,在纳米尺度上调谐声子输运的工作很少。本文通过引入Ar+等离子体,研究了二维层状半导体PdSe2在不同缺陷浓度下的声子输运。通过热桥法测得,经过一定的Ar+辐照后,材料的导热系数下降了50%,表明材料可能发生了相变。拉曼表征表明,随着缺陷浓度的增加,PdSe2的拉曼敏感峰发生红移,最终消失。“缺陷工程”被证明是调节低维材料中声子热输运的一种实用策略,从而为设计各种新兴材料的热电器件提供了潜在的应用指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Engineering phonon thermal transport in few-layer PdSe2

Engineering phonon thermal transport in few-layer PdSe2

Engineering phonon transport in low-dimensional materials has great significance not only for fundamental research, but also for thermal management applications of electric devices. However, due to the difficulties of micro and nano processing and characterization techniques, the work on tuning phonon transport at nanoscale are scarce. In this work, by introducing Ar+ plasma, we probed the phonon transport in two-dimensional (2D) layered semiconductor PdSe2 under different defect concentrations. By using thermal bridge method, the thermal conductivity was measured to decrease by 50% after a certain Ar+ irradiation, which implied a possible phase transition. Moreover, Raman characterizations were performed to show that the Raman sensitive peaks of PdSe2 was red-shifted and finally became disappeared with the increase of defect concentration. “Defect engineering” proves be a practical strategy in tuning the phonon thermal transport in low-dimensional materials, thus providing guidance for potential application in designing thermoelectric devices with various emerging materials.

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来源期刊
Frontiers of Physics
Frontiers of Physics PHYSICS, MULTIDISCIPLINARY-
CiteScore
9.20
自引率
9.30%
发文量
898
审稿时长
6-12 weeks
期刊介绍: Frontiers of Physics is an international peer-reviewed journal dedicated to showcasing the latest advancements and significant progress in various research areas within the field of physics. The journal's scope is broad, covering a range of topics that include: Quantum computation and quantum information Atomic, molecular, and optical physics Condensed matter physics, material sciences, and interdisciplinary research Particle, nuclear physics, astrophysics, and cosmology The journal's mission is to highlight frontier achievements, hot topics, and cross-disciplinary points in physics, facilitating communication and idea exchange among physicists both in China and internationally. It serves as a platform for researchers to share their findings and insights, fostering collaboration and innovation across different areas of physics.
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