在γ-GeSe的介层堆叠中发生的热诱导不可逆转的障碍
Joonho Kim1, Giyeok Lee2, Sol Lee1,3
1Department of Physics, Yonsei University, Seoul, 03722, South Korea.
Small (Weinheim an der Bergstrasse, Germany)
|October 23, 2024
概括
范德瓦尔斯 (vdW) 晶体中层间堆叠移动对于材料特性至关重要. 在 γ-GeSe 中,电气或热处理不可逆转地破坏了堆叠序列,影响了晶体的行为.
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
- 固态化学 固态化学
背景情况:
- 范德瓦尔斯 (vdW) 晶体中层间堆叠变化是调整材料特性 (如磁性和铁电性) 的关键.
- 在vdW晶体中由间层滑动驱动的结构相位过渡的理解被厚度依赖和样本特定的行为与歇斯底里复杂化.
研究的目的:
- 为了研究vdW晶体的堆叠配置, γ-GeSe.Se.
- 为了证明在 γ-GeSe.Se 中对堆叠序列障碍的操纵.
- 阐明控制VDW晶体堆叠转移的结构参数.
主要方法:
- 原子分辨率扫描传输电子显微镜 (STEM) 来确认堆叠配置的变化.
- 对STEM数据进行统计分析,以量化堆叠障碍.
- 第一个原则计算和参数化建模来检查堆叠能量和层间滑动屏障.
主要成果:
- 作为合成的 γ-GeSe 呈现出一个有序的 AB' 堆叠配置.
- 通过电偏差或热处理进行焦尔加热会导致堆叠序列的不可逆转扰乱.
- 较高的电偏差水平导致最大堆叠障碍,由STEM证实.
- 计算确定了影响堆叠转移的关键结构参数.
结论:
- γ-GeSe的堆叠配置容易通过电气或热处理导致不可逆转的破坏.
- 这种堆叠障碍显著影响了对VDW晶体特性的理解.
- 仔细考虑堆叠易感性对于理解vdW晶体的结构和电气性能至关重要.
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