揭示了Ga在缺陷氏体类型In2Se3-Ga2Se3系统中的独特位置偏好:一个实验和计算研究
Siddha Sankalpa Sethi1,2, Achintya Lakshan2, Ahin Roy3
1Department of Metallurgical and Materials Engineering, IIT Kharagpur, Kharagpur, 721302, India. karabi@metal.iitkgp.ac.in.
Dalton transactions (Cambridge, England : 2003)
|May 6, 2025
概括
这项研究详细介绍了伪二进制In2-xGaXSe3阶段的结构特征,揭示了不同的结构类型和.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 伪二进制 In2Se3-Ga2Se3 系统相表现出有趣的结构特征和非线性光学 (NLO) 特性.
- 之前的研究缺乏这些已知的阶段的详细结构特征.
研究的目的:
- 使用实验和计算方法,对伪二进制In2-xGaxSe3 (x = 0.61.4) 进行详细的结构特征.
- 阐明在六角晶体结构中的协调偏好.
主要方法:
- 在高温合成In2-xGaxSe3样本.
- 用于结构分析的X射线衍射 (XRD).
- 密度函数理论 (DFT) 计算用于理论见解.
主要成果:
- 对于x ≤ 1,观察到一个分层的缺陷石结构 (γ1),质优先占据四面体的位.
- 一个有序的 γ1-GaInSe3 在 x = 1 时形成.
- 对于1.2 < x ≤ 1.4,发现了一个理想的缺陷石结构 (γ2),其中占据了一个四面体位,另一个由Ga和In统计占据.
- 在 x = 1.2 时,由 γ1 和 γ2 阶段的相互生长产生了一个无序的结构.
- DFT计算证实了在III2-VI3家族中对四面体协调的偏好.
结论:
- 这项研究揭示了基于构成的In2-xGaxSe3系统中明显的结构过渡.
- 证实了的协调偏好,影响了得到的晶体结构.
- 这些发现为理解和潜在调整这些材料的NLO特性提供了基础.
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