Roller Coaster in a Flatland: Magnetoresistivity in Eu-Intercalated Graphite

Roller Coaster in a Flatland: Magnetoresistivity in Eu-Intercalated Graphite
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平地上的过山车:铕插层石墨的磁阻

DOI:
10.1103/physrevx.12.021010
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发表时间:
2022
期刊:
影响因子:
12.5
通讯作者:
Starykh, O. A.
Starykh, O. A.
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Chernyshev, A. L.;Starykh, O. A.

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磁插层石墨中的新现象一直是许多研究的主题,由M. S。和G. Dresselhaus和其他许多人在20世纪80年代。那个时代最神秘的发现之一是化合物中磁电阻率的戏剧性,过山车般的行为,其中磁化子形成与石墨蜂窝平面相称的三角形晶格。在这项研究中,我们提供了一个期待已久的微观解释这种行为,表明电阻率是由自旋激发Eu平面和他们的高度非平凡的演变与磁场。结合我们的理论分析,本研究展示了合成2D材料的力量,作为对奇异自旋激发性质的潜在重要见解的来源。
Novel phenomena in magnetically intercalated graphite have been the subject of much research, pioneered and promoted by M. S. and G. Dresselhaus and many others in the 1980s. Among the most enigmatic findings of that era was the dramatic, roller-coaster-like behavior of the magnetoresistivity in acompound, in which magneticions form a triangular lattice that is commensurate to graphite honeycomb planes. In this study, we provide a long-awaitedmicroscopicexplanation of this behavior, demonstrating that the resistivity ofis dominated by spin excitations in Eu planes and their highly nontrivial evolution with the magnetic field. Together with our theoretical analysis, the present study showcases the power of the synthetic 2D materials as a source of potentially significant insights into the nature of exotic spin excitations.
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