arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.07025cond-mat.mtrl-scicond-mat.mes-hall
收藏

MnBi2Te4单分子膜的纳米器件工程和自旋输运性质

Nanodevices engineering and spin transport properties of MnBi2Te4 monolayer

Yipeng An, Kun Wang, Shijing Gong, Yusheng Hou, Chunlan Ma, Mingfu Zhu, Chuanxi Zhao, Tianxing Wang, Shuhong Ma, Heyan Wang, Ruqian Wu, Wuming Liu

摘要:

二维磁性材料是下一代自旋电子技术发展的关键。近年来,层状van der Waals(vdW)化合物MnBi 2 Te 4(MBT)引起了人们极大的兴趣,据报道其二维结构具有磁性和拓扑结构共存的特点。在这里,我们设计了几个概念的纳米器件的MBT单层(MBT-ML)的基础上,并揭示其自旋相关的输运性质的第一性原理计算。pn结二极管和亚3 nm pin结场效应晶体管(FET)显示出很强的整流效应和自旋过滤效应,即使在合理的高温下,理想因子n也接近1。此外,pip结和nin结FET产生了有趣的负微分电阻(NDR)效应。栅极电压可以在大范围内调谐通过这些FET的电流。此外,MBT-ML对光有很强的响应。我们的研究结果揭示了MBT-ML的多功能性质,为其在各种下一代半导体自旋电子器件中的应用铺平了道路。

英文摘要:

Two-dimensional (2D) magnetic materials are essential for the development of the next-generation spintronic technologies. Recently, layered van der Waals (vdW) compound MnBi2Te4 (MBT) has attracted great interest, and its 2D structure has been reported to host coexisting magnetism and topology. Here, we design several conceptual nanodevices based on MBT monolayer (MBT-ML) and reveal their spin-dependent transport properties by means of the first-principles calculations. The pn-junction diodes and sub-3-nm pin-junction field-effect transistors (FETs) show a strong rectifying effect and a spin filtering effect, with an ideality factor n close to 1 even at a reasonably high temperature. In addition, the pip- and nin-junction FETs give an interesting negative differential resistive (NDR) effect. The gate voltages can tune currents through these FETs in a large range. Furthermore, the MBT-ML has a strong response to light. Our results uncover the multifunctional nature of MBT-ML, pave the road for its applications in diverse next-generation semiconductor spin electric devices.

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。

↑