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arXiv 1808.09402cond-mat.mes-hall
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过渡金属二硫族化合物的横向界面:一个稳定可调的一维物理平台

Lateral Interfaces of Transition Metal Dichalcogenides: A Stable Tunable One-Dimensional Physics Platform

Oscar Ávalos-Ovando, Diego Mastrogiuseppe, Sergio E. Ulloa

摘要:

我们研究在平面横向异质结构的相称过渡金属二硫族化物,如MoS $_{2}$ -WS $_{2}$和MoSe $_{2}$ -WSe $_{2}$,并发现界面和边缘状态,高度本地化的异质结构的这些区域。这些是一维(1D)的性质,躺在带隙的散装结构,并表现出复杂的轨道和自旋结构。我们描述这样的heteroribbons与三轨道紧束缚模型,使用第一性原理和实验参数作为输入,使我们能够模拟现实的系统。分析建模的1D界面带的结果在远程跳跃由于沿界面的杂交,具有较强的自旋轨道耦合。我们进一步探讨了位于界面处的磁性杂质之间的Ruderman-Kittel-Kasuya-Yosida间接相互作用。不寻常的界面态的特点导致有效的长程交换杂质之间的非共线相互作用。这些结果表明,过渡金属二硫属化物界面可以作为稳定的,可调的一维平台,具有独特的性能,可能用于探索马约拉纳费米子,等离子体激发和自旋电子学应用。

英文摘要:

We study in-plane lateral heterostructures of commensurate transition-metal dichalcogenides, such as MoS$_{2}$-WS$_{2}$ and MoSe$_{2}$-WSe$_{2}$, and find interfacial and edge states that are highly localized to these regions of the heterostructure. These are one-dimensional (1D) in nature, lying within the bandgap of the bulk structure and exhibiting complex orbital and spin structure. We describe such heteroribbons with a three-orbital tight-binding model that uses first principles and experimental parameters as input, allowing us to model realistic systems. Analytical modeling for the 1D interfacial bands results in long-range hoppings due to the hybridization along the interface, with strong spin-orbit couplings. We further explore the Ruderman-Kittel-Kasuya-Yosida indirect interaction between magnetic impurities located at the interface. The unusual features of the interface states result in effective long-range exchange non-collinear interactions between impurities. These results suggest that transition-metal dichalcogenide interfaces could serve as stable, tunable 1D platform with unique properties for possible use in exploring Majorana fermions, plasma excitations and spintronics applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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