Review: Exploring spin properties in van der Waals materials with star-of-David pattern

Liwei Liu , Xuan Song , Xinyu Huang , Hongyan Ji , Ziying Hu , Yuan Huang , Hong-Jun Gao , Yeliang Wang
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Abstract

The spin properties in van der Waals (vdW) low-dimensional materials have attracted increasing research interest due to their potential application in future nano-spintronic devices. Among the vast members of vdW materials, those with star-of-David (SOD) charge density wave (CDW) patterns are emergent. Here, we give a review of the recent experimental and theoretical progress achieved on this kind of material. First, the features and advantages of exploring spin properties in SOD materials are briefly introduced. Second, the influences of different stacking on the spin properties of SOD systems are discussed, from single-layer to bilayer and then to bulk with different phase combinations by taking advantage of the vdW nature, manifesting various spin phenomena such as the 120° in-plane antiferromagnetism, quantum spin liquid, and the Kondo effect. Then we give some examples of manipulation methods such as doping, strain, and electric field, which can induce the change of spin features. Finally, the current challenges and opportunities at the frontier in this research field are discussed.

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综述:探索具有大卫之星图案的范德华材料的自旋特性
范德华(vdW)低维材料的自旋特性由于其在未来纳米自旋电子器件中的潜在应用而引起了越来越多的研究兴趣。在众多的vdW材料中,具有戴维之星(SOD)电荷密度波(CDW)模式的材料是新兴的。本文综述了近年来在这类材料上取得的实验和理论进展。首先,简要介绍了超氧化物歧化酶材料自旋特性研究的特点和优势。其次,讨论了不同堆叠方式对超氧化物歧化酶体系自旋性能的影响,利用超氧化物歧化酶的特性,从单层到双层,再到不同相组合的体,表现出120°平面内反铁磁性、量子自旋液体和近藤效应等多种自旋现象。然后给出了掺杂、应变和电场等可以诱导自旋特性变化的操纵方法。最后,讨论了当前该研究领域前沿面临的挑战和机遇。
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