带之字形和扶手椅方向的磷烯原子尺度疲劳声子耗散

IF 3.2 3区 化学 Q2 CHEMISTRY, PHYSICAL
Yun Dong, Jinguang Wang, Yi Tao, Futian Yang, Xinyi Tang, Bo Shi, Yifan Liu
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引用次数: 0

摘要

在此,我们研究了磷烯在之字形和扶手椅方向上的低周疲劳特性及其声子能量耗散。结果表明,磷烯的扶手椅方向比之字形方向具有更高的疲劳寿命。疲劳寿命与激励频率和激励幅值均呈负相关。疲劳过程中出现应力积累现象,直至原子间键断裂产生裂纹。随着激励频率的增加,应力积累效率提高,疲劳寿命降低。随着激励频率和激励幅值的增加,面内声模态数量增加,产生新的能量耗散通道;更多携带能量的声子被激发,最终导致更高的能量耗散效率,从而降低疲劳寿命。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Phonon Dissipation of Atomic-Scale Fatigue in Phosphorene with Zigzag and Armchair Directions

Phonon Dissipation of Atomic-Scale Fatigue in Phosphorene with Zigzag and Armchair Directions
Herein, we explore the low-cycle fatigue properties of phosphorene in the zigzag and armchair directions as well as their phonon energy dissipation. The results indicate that the armchair direction of phosphorene possesses a fatigue life higher than that of the zigzag direction. Moreover, the fatigue life is negatively correlated with both excitation frequency and excitation amplitude. The phenomenon of stress accumulation occurs during the fatigue process until the interatomic bonds break to produce cracks. In addition, the stress accumulation efficiency rises as the excitation frequency increases, and the fatigue life is lower. As the excitation frequency and excitation amplitude increase, the number of in-plane acoustic modes increases, generating new energy dissipation channels; more energy-carrying phonons are excited, which ultimately leads to higher energy dissipation efficiency and therefore lower fatigue life.
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来源期刊
The Journal of Physical Chemistry C
The Journal of Physical Chemistry C 化学-材料科学:综合
CiteScore
6.50
自引率
8.10%
发文量
2047
审稿时长
1.8 months
期刊介绍: The Journal of Physical Chemistry A/B/C is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.
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