arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2101.05071cond-mat.mtrl-sci
收藏

3d过渡金属掺杂调控单层VI3磁电性质的第一性原理研究

Tuning the Magnetic and Electronic Properties of Monolayer VI3 by 3d Transition Metal Doping: A First-Principles Study

Charles Sun, Xuan Luo

摘要:

具有强磁性的二维材料在自旋电子学中有着广阔的应用前景,引起了人们极大的关注。最近,本征铁磁三碘化钒(VI 3)已被实验合成。为了提高其自旋电子学性能,我们对VI 3进行了间隙掺杂,并用第一性原理计算研究了VI 3和3d过渡金属(TM)掺杂的VI 3单层膜的几何结构、形成能、电子性质和磁性.在八种过渡金属(Sc-、Ti-、V-、Cr-、Mn-、Fe-、Co-和Ni-)掺杂的VI 3材料中,其中四种(Ti-、V-、Mn-和Ni-掺杂的VI 3)显示出在费米能附近具有全自旋极化的稳健磁性。我们的研究表明,Ti掺杂的VI 3导致半金属半导体特性(HMS),而V掺杂的VI 3和Ni掺杂的VI 3导致半半导体特性(HSC)。令人惊讶的是,Mn掺杂的VI 3表现出不寻常的双极磁性半导体性质(BMS)。这种强铁磁性和100%自旋极化与半金属、半导体或双极半导体性质的独特组合使得3d TM掺杂的VI 3成为下一代半导体自旋电子应用的潜在候选者。这些自旋极化材料将是非常有用的自旋电流产生和其他自旋电子应用。

英文摘要:

Two-dimensional (2D) materials with robust magnetism have drawn immense attention for their promising applications in spintronics. Recently, intrinsic ferromagnetic vanadium triiodide (VI3) has been synthesized experimentally. To enhance its spintronic property, we modified VI3 by interstitial doping with 3d transition metals (TM) and used first-principles calculations to investigate the geometric structure, formation energy, electronic property, and magnetism of pristine VI3 and 3d TM-doped VI3 monolayer. Among eight transition metal (Sc-, Ti-, V-, Cr-, Mn-, Fe-, Co-, and Ni-) doped VI3 materials, four of them (Ti-, V-, Mn-, and Ni-doped VI3) show robust magnetism with full spin polarization near the Fermi energy. Our research demonstrates that Ti-doped VI3 results in half-metallic semiconductor properties (HMS), while V-doped VI3 and Ni-doped VI3 result in half-semiconductor properties (HSC). Surprisingly, Mn-doped VI3 exhibits an unusual bipolar magnetic semiconductor property (BMS). This unique combination of strong ferromagnetism and 100% spin polarization with a half-metallic, half-semiconductor, or bipolar semiconductor property renders 3d TM-doped VI3 as potential candidates for next generation semiconductor spintronic applications. These spin-polarized materials will be extremely useful for spin-current generation and other spintronic 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。

↑