Edge magnetic properties of black phosphorene nanoribbons
Edge magnetic properties of black phosphorene nanoribbons
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DOI：
10.1103/physrevb.103.075108
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发表时间：
2020-12
影响因子：
3.7
通讯作者：
J. Vahedi;R. Peters
中科院分区：
文献类型：
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作者：
J. Vahedi;R. Peters
利用静态和动态平均场理论研究了黑色磷烯纳米带的磁性。除了确认铁磁/反铁磁边缘磁性的存在，我们的详细计算使用大的晶胞发现在弱相互作用强度的一个无公度（IC）的磁性相的相变。详细的傅立叶分析的IC阶段的磁化模式的存在下，第二个临界相互作用强度，在那里的不相称的阶段的反铁磁（AFM）或铁磁（FM）相的变化。我们证明了AFM和FM相位的基态能量的差异是指数小，使得有可能通过一个小的外部场在两个状态之间切换。最后，我们分析了应变和无序对磁性的影响，并表明，虽然IC相是强大的安德森型无序，它是脆弱的应变。
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.