NiSi Film Synthesized by Isochronal Annealing in a Magnetron Sputtering System

By repeatedly pre-cleaning the sputtering chamber with Ar gas and in-situ isochronal annealing samples, NiSi films are successfully prepared on Si （100） substrates in a radio-frequency magnetron sputtering system. A comparison between the obtained NiSi and excess oxygen-contaminated Ni/Si films has been performed by EDX analysis of oxygen atomic content in both the films. Focused ion beam milling technology is employed to make the cross-sections of the samples for characterizing the NiSi film thickness and NiSi/Si interface roughness. The influences of nickel film thickness on the NiSi-film morphology and on the NiSi/Si interface roughness are studied.     

薄膜异质结及二维材料中的磁斯格明子

磁斯格明子因具有拓扑稳定、移动速度快、尺寸小、驱动电流密度低等优异性质引起了人们的广泛关注。它被视作未来超高密度磁存储和逻辑功能器件的理想信息载体。基于磁斯格明子的自旋电子学器件具有非易失、高读写速度、高存储密度以及低功耗的优势,从而能满足人们对高性能器件的要求。此外,拓扑性与磁性的结合使得磁斯格明子成为研究拓扑磁性物理的良好平台。文章简要介绍了磁斯格明子的发展概况及其拓扑物理性质,并着重讨论薄膜异质结及二维材料中磁斯格明子的研究进展,为今后进一步探索磁斯格明子相关研究领域抛砖引玉。     

Strain-Enabled Control of Chiral Magnetic Structures in MnSeTe Monolayer

Chiral magnetic states are promising for future spintronic applications. Recent progress of chiral spin textures in two-dimensional magnets, such as chiral domain walls, skyrmions, and bimerons, have been drawing extensive attention. Here, via first-principles calculations, we show that biaxial strain can effectively manipulate the magnetic parameters of the Janus Mn Se Te monolayer. Interestingly, we find that both the magnitude and the sign of the magnetic constants of the Heisenberg exchange ...     

Quantum Anomalous Hall Effects Controlled by Chiral Domain Walls

We report the interplay between two different topological phases in condensed matter physics, the magnetic chiral domain wall(DW), and the quantum anomalous Hall(QAH) effect. It is shown that the chiral DW driven by Dzyaloshinskii–Moriya interaction can divide the uniform domain into several zones where the neighboring zone possesses opposite quantized Hall conductance. The separated domain with a chiral edge state(CES) can be continuously modified by external magnetic field-induced domain expan...