José Guimarães, Dorsa S. Fartab, Michal Moravec, Marcus Schmidt, Michael Baenitz, Burkhard Schmidt, Haijing Zhang
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引用次数: 0
摘要
在这项研究中,我们报告了一种层状材料中同时出现的定向近藤行为和不相称磁有序现象。我们采用与温度和磁场相关的电阻率测量、电感测量和高分辨率波长 X 射线衍射光谱来研究 AgCrSe2 的电子特性。通过对平面内电阻率的定量分析,确定了杂质 Kondo 行为,其特征温度为 TK = 32 K,并通过磁传输测量得到证实。我们的实验数据与 Schlottmann 缩放理论之间的出色一致性使我们能够确定杂质自旋为 S = 3/2。此外,我们还讨论了近藤行为的起源及其与材料反铁磁转变的关系。我们的研究发现了一个罕见的现象--奈尔温度和近藤温度相等--这为进一步研究量子材料中杂质物理和磁现象之间错综复杂的相互作用铺平了道路,并有望应用于先进的电子和磁性器件中。这项研究报告了在层状材料 AgCrSe2 中同时出现的杂质近藤效应和不相称磁有序现象,这些通常相互排斥的现象相辅相成。将近藤效应与反铁磁有序结合起来的能力,为调整磁关联与近藤屏蔽之间的竞争提供了一条新的途径。
Concurrence of directional Kondo transport and incommensurate magnetic order in the layered material AgCrSe2
In this work, we report on the concurrent emergence of the directional Kondo behavior and incommensurate magnetic ordering in a layered material. We employ temperature- and magnetic field-dependent resistivity measurements, susceptibility measurements, and high resolution wavelength X-ray diffraction spectroscopy to study the electronic properties of AgCrSe2. Impurity Kondo behavior with a characteristic temperature of TK = 32 K is identified through quantitative analysis of the in-plane resistivity, substantiated by magneto-transport measurements. The excellent agreement between our experimental data and the Schlottmann’s scaling theory allows us to determine the impurity spin as S = 3/2. Furthermore, we discuss the origin of the Kondo behavior and its relation to the material’s antiferromagnetic transition. Our study uncovers a rare phenomenon—the equivalence of the Néel temperature and the Kondo temperature—paving the way for further investigations into the intricate interplay between impurity physics and magnetic phenomena in quantum materials, with potential applications in advanced electronic and magnetic devices. This study reports on the simultaneous emergence of the impurity Kondo effect and incommensurate magnetic ordering in the layered material AgCrSe2 these usually mutually exclusive phenomena complement each other. The ability to enable Kondo effect in association with the antiferromagnetic order, provides a novel route to tune the competition between magnetic correlations and Kondo screening.
期刊介绍:
Communications Physics is an open access journal from Nature Research publishing high-quality research, reviews and commentary in all areas of the physical sciences. Research papers published by the journal represent significant advances bringing new insight to a specialized area of research in physics. We also aim to provide a community forum for issues of importance to all physicists, regardless of sub-discipline.
The scope of the journal covers all areas of experimental, applied, fundamental, and interdisciplinary physical sciences. Primary research published in Communications Physics includes novel experimental results, new techniques or computational methods that may influence the work of others in the sub-discipline. We also consider submissions from adjacent research fields where the central advance of the study is of interest to physicists, for example material sciences, physical chemistry and technologies.