论文标题

黑磷纳米骨的边缘磁性

Edge magnetic properties of black phosphorene nanoribbons

论文作者

Vahedi, Javad, Peters, Robert

论文摘要

使用静态和动态平均场理论研究了黑磷纳米容器的磁性。除了确认存在铁磁/抗铁磁边缘磁性的存在之外,我们使用大型单位细胞的详细计算找到了相互作用强度较弱的相位转换到不稳定的(IC)磁相。 IC相中的磁化模式的详细傅立叶分析显示了第二个临界相互作用强度的存在,其中不相称的相变为抗铁磁(AFM)或铁磁(FM)相。我们证明,AFM和FM相的基态能量的差异成倍小,因此可以通过一个小的外部场在两个状态之间切换。最后,我们分析了应变和混乱对磁性特性的影响,并表明虽然IC相位对Anderson型疾病具有鲁棒性,但它却易碎菌株。

The magnetic properties of black phosphorene nanoribbons are investigated using static and dynamical mean-field theory. Besides confirming the existence of ferromagnetic/antiferromagnetic edge magnetism, our detailed calculations using large unit-cells find a phase-transition at weak interaction strength to an incommensurate (IC) magnetic phase. A detailed Fourier analysis of the magnetization patterns in the IC phase shows the existence of a second critical interaction strength, where the incommensurate phase changes to an antiferromagnetic (AFM) or ferromagnetic (FM) phase. We demonstrate that the difference of the ground state energies of the AFM and FM phase is exponentially small, making it possible to switch between both states by a small external field. Finally, we analyze the influence of strain and disorder on the magnetic properties and show that while the IC phase is robust to Anderson type disorder, it is fragile against strain.

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