A molecular dynamics study on indentation response of single crystalline wurtzite GaN
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- A molecular dynamics study on indentation response of single crystalline wurtzite GaN
- 发表刊物：
- Journal of Applied Physics
- 摘要：
- Journal of Applied Physics 124, 115102 (2018); https://doi.org/10.1063/1.5041738
A series of molecular dynamics simulations are carried out to investigate the plastic deformation in wurtzite GaN. Besides the formation of an amorphous zone under the contact region, plastic slips nucleated on the m plane (10-10), c plane (0001), r plane (10-12), and s plane (10-11) are observed in the indentation. Combined with a close analysis of critical stress that induces a specific slip on different crystalline planes, the defect evolution is discussed in detail. Slip systems of [10-1-1](10-12) and 1/3[2-1-1-3](10-11) on the pyramidal planes are not supposed to nucleate easily since higher stress is required to activate them. However, a significant decrease in the shear stress that induces a pyramidal slip could be expected if the slip evolves gradually following a two-step procedure. The gradual slips on both the r plane (10-12) and s plane (10-11) are observed in our indentation simulation; the mechanism is studied by the calculation of generalized stacking fault energy.
- 合写作者：
- Yu Qian, Fulin Shang, Qiang Wan, and Yabin Yan
- 卷号：
- 124
- 页面范围：
- 115102
- 是否译文：
- 否
- 发表时间：
- 2018-09-19