设计原则和实验证据半导体Heusler热电通过空白填充
Yifei Huang1, Zirui Dong2, Zhiwei Chen1
1Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai, China.
Small (Weinheim an der Bergstrasse, Germany)
|January 25, 2026
概括
填空空隙的Heusler半导体是通过创建一个带隙来设计的. 非静电测量TiFe$_{x}$Co$_{y}$Sb合金表现出半导体行为和有前途的热电特性,热导率降低.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 填空策略有效地扩大了Heusler材料家族.
- 通过控制轨道能量差距 (t2g和eg),可以设计Heusler半导体.
研究的目的:
- 设计具有半导体性质的填空Heusler半导体.
- 为了研究非静电测量TiFe$_{x}$Co$_{y}$Sb合金的热电特性.
主要方法:
- 实验合成非静态测量TiFe$_{x}$Co$_{y}$Sb的豪斯勒合金.
- 描述它们的半导体行为和热电特性.
- 由于工地占用而导致格子导热率降低的分析.
主要成果:
- TiFe$_{x}$Co$_{y}$Sb合金 (2x + 3y = 3) 表现出 p 型半导体行为.
- 由于4d站点的部分占用,观察到显著降低的格子导热率 (κ$_{L}$).
- TiFeCo$_{0.33}$Sb 在室温下达到2.77 W m^-1$ K$^-1$ 的低 κ$_{L}$ .
- 在TiFe$_{0.5}$Co$_{0.67}$Sb.中表示最佳的热电性能 (功率值=0.53在973K)
结论:
- 填空策略在设计半导体Heusler材料方面是有效的.
- TiFe$_{x}$Co$_{y}$Sb合金显示出增强热电应用的潜力.
- 可调节的热电特性可以通过受控的非静电测量来实现.
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