化驱动的超低晶格导热率在烯中β12
Ashish Sharma1, Vir Singh Rangra1
1Department of Physics, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005, India.
概括
化显著降低了烯纳米板的导热性,增强了它们用于热电应用的潜力. 这项研究探讨了功能化的烯,以提高二维材料性能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 烯表现出多态性和可取的电子特性,如迪拉克体和金属性.
- 氧化限制了烯的实际应用,激励了对稳定形式的研究.
- 化玻罗最近已经合成,显示了利用玻罗的潜力的希望.
研究的目的:
- 调查,,,和碳对独立的β12烯纳米片的兴奋剂和功能化的影响.
- 使用第一原则计算,选功能化的烯纳米片的稳定配置.
- 分析原始和化β12烯纳米片的电子,机械和运输特性.
主要方法:
- 使用第一原理计算来确定结构和电子属性.
- 采用博尔兹曼运输理论来计算导热率和热电值的数字.
- 评估了纳米片的动态和机械稳定性.
主要成果:
- 确定原始和化β12烯纳米片作为稳定的配置.
- 在化烯中观察到异构金属性和增强的脆性行为.
- 发现化转移并增强迪拉克,引入额外的费米口袋.
- 在化后,晶格导热率显著降低 (两倍).
- 实现了超低的晶格导热率,这归因于声平均自由路径的减少和声散射的增加.
- 在室温下报告了化β12烯的更高的热电功率 (∼0.75).
结论:
- 功能化,特别是化,大大改变了β12烯纳米片的运输特性.
- 化烯的导热率显著降低,使其成为热电器件的有希望的候选者.
- 这项研究扩大了基二维材料在热电和其他先进技术中的应用范围.
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