在反铁磁维尔半金属GdSiAlAl中探索量子振荡
Priyanka Meena1, Amarjyoti Choudhury2, Mohit Mudgal1
1Department of Physics, Indian Institute of Technology, Kanpur 208016, India.
Journal of physics. Condensed matter : an Institute of Physics journal
|November 11, 2024
概括
我们发现GdSiAl具有显著的磁阻和拓性质. 这种抗铁磁拓Weyl半金属显示了未来电子应用的潜力.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子材料是一种量子材料.
背景情况:
- 拓半金属是一种具有独特电子性质的材料类.
- 了解磁力和拓之间的相互作用对于发现新的量子材料至关重要.
- 基于加多的金属间化合物为探索异国情调的磁性和电子现象提供了一个平台.
研究的目的:
- 为了研究GdSiAl单晶体的磁性和磁传输特性.
- 使用理论计算来探索GdSiAl的电子结构和拓性质.
- 要确定GdSiAl是否可以被归类为一种抗铁磁的拓Weyl半金属.
主要方法:
- 使用磁性,磁传输和热容量测量的实验研究.
- 第一原则密度函数理论 (DFT) 计算用于电子结构分析.
- 分析舒布尼科夫-德哈斯振荡以确定费米表面属性和贝里相.
主要成果:
- 观察到显著的非和磁电阻 (在12T和2K时约18%) 和舒布尼科夫-德哈斯振荡.
- 确定了32K以下的反铁磁顺序,在~8K的额外过渡,通过敏感性和热容量数据得到证实.
- DFT计算揭示了位于费米水平附近的嵌套费米表面口袋和韦尔节点,与实验磁顺序一致.
结论:
- GdSiAl表现出复杂的磁性排序和显著的磁电阻.
- 该材料具有拓特征,包括非平凡的贝里阶段和韦尔节点.
- GdSiAl是抗铁磁拓Weyl半金属的有希望的候选者,需要进一步研究.
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