了解和操纵 EuM2X2(M= Zn、Cd;X= P、As)磁性和电子特性的最新进展。

IF 2.3 4区 物理与天体物理 Q3 PHYSICS, CONDENSED MATTER Journal of Physics: Condensed Matter Pub Date : 2024-11-01 DOI:10.1088/1361-648X/ad882b
Xiyu Chen, Shuai Dong, Zhi-Cheng Wang
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引用次数: 0

摘要

过去五年来,在了解 CaAl2Si2 型 EuM2X2(M= Zn、Cd;X= P、As)化合物的磁性和电子特性方面取得了重大进展。之前的理论工作和实验研究表明,EuCd2As2 有潜力容纳丰富的拓扑相,特别是当自旋沿轴向极化时的理想磁性韦尔半金属态。然而,最近利用具有超低载流子密度的样品进行的实验以及采用各种方法进行的细致计算都对这一观点提出了挑战。尽管如此,EuM2X2 家族仍然表现出许多新颖的特性,如巨大的非线性反常霍尔效应和巨大的磁阻效应,这些特性仍有待令人满意的解释。此外,通过引入少量载流子或施加外部压力,EuM2X2 化合物可以从半导体反铁磁体转变为金属铁磁体,而通过减小单位晶胞体积可以进一步提高铁磁转变温度。这些特点使 EuM2X2 家族成为研究磁性和电荷传输之间相互作用的肥沃平台,也是自旋电子学应用的绝佳候选材料。本文全面综述了具有不同载流子密度的 EuM2X2 化合物的磁性和传输行为,以及目前对这些特性的见解。本文还对未来的研究机会进行了展望。
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Recent advances in understanding and manipulating magnetic and electronic properties of EuM2X2(M= Zn, Cd;X= P, As).

Over the past five years, significant progress has been made in understanding the magnetism and electronic properties of CaAl2Si2-type EuM2X2(M= Zn, Cd;X= P, As) compounds. Prior theoretical work and experimental studies suggested that EuCd2As2had the potential to host rich topological phases, particularly an ideal magnetic Weyl semimetal state when the spins are polarized along thecaxis. However, this perspective is challenged by recent experiments utilizing samples featuring ultra-low carrier densities, as well as meticulous calculations employing various approaches. Nonetheless, the EuM2X2family still exhibit numerous novel properties that remain to be satisfactorily explained, such as the giant nonlinear anomalous Hall effect and the colossal magnetoresistance effect. Moreover, EuM2X2compounds can be transformed from semiconducting antiferromagnets to metallic ferromagnets by introducing a small number of carriers or applying external pressure, and a further increase in the ferromagnetic transition temperature can be achieved by reducing the unit cell volume. These features make the EuM2X2family a fertile platform for studying the interplay between magnetism and charge transport, and an excellent candidate for applications in spintronics. This paper presents a comprehensive review of the magnetic and transport behaviors of EuM2X2compounds with varying carrier densities, as well as the current insights into these characteristics. An outlook for future research opportunities is also provided.

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来源期刊
Journal of Physics: Condensed Matter
Journal of Physics: Condensed Matter 物理-物理:凝聚态物理
CiteScore
5.30
自引率
7.40%
发文量
1288
审稿时长
2.1 months
期刊介绍: Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.
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