Stagraczyński S, Baláž P, Jafari M, Barnaś J, Dyrdał A
Faculty of Physics and Astronomy, Adam Mickiewicz University in Poznań, ul, Uniwersytetu Poznańskiego 2, 61-614, Poznań, Poland.
FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21, Prague 8, Czech Republic.
Sci Rep. 2024 Oct 26;14(1):25552. doi: 10.1038/s41598-024-75501-2.
We analyze magnetic properties of monolayers and bilayers of chromium iodide, [Formula: see text], in two different stacking configurations: AA and rhombohedral ones. Our main focus is on the corresponding Curie temperatures, hysteresis curves, equilibrium spin structures, and spin wave excitations. To obtain all these magnetic characteristic, we employ the atomistic spin dynamics and Monte Carlo simulation techniques. The model Hamiltonian includes isotropic exchange coupling, magnetic anisotropy, and Dzyaloshinskii-Moriya interaction. As the latter interaction is relatively weak in pristine [Formula: see text], we consider a more general case, when the Dzyaloshinskii-Moriya interaction is enhanced externally (e.g. due to gate voltage, mechanical strain, or proximity effects). An important issue of the analysis is the correlation between hysteresis curves and spin configurations in the system, as well as formation of the skyrmion textures.
我们分析了碘化铬单层和双层（[化学式：见原文]）在两种不同堆叠构型下的磁性：AA构型和菱面体构型。我们主要关注相应的居里温度、磁滞回线、平衡自旋结构以及自旋波激发。为了获得所有这些磁性特征，我们采用了原子自旋动力学和蒙特卡罗模拟技术。模型哈密顿量包括各向同性交换耦合、磁各向异性以及Dzyaloshinskii-Moriya相互作用。由于后者在原始的[化学式：见原文]中相对较弱，我们考虑一种更一般的情况，即Dzyaloshinskii-Moriya相互作用通过外部方式增强（例如由于栅极电压、机械应变或邻近效应）。分析中的一个重要问题是系统中磁滞回线与自旋构型之间的相关性，以及斯格明子纹理的形成。
