Kumari P, Majumder S, Rani S, Nair A K, Kumari K, Kamalakar M Venkata, Ray S J
Department of Physics, Indian Institute of Technology Patna, Bihta 801106, India.
Phys Chem Chem Phys. 2020 Mar 14;22(10):5893-5901. doi: 10.1039/c9cp05390e. Epub 2020 Feb 28.
Phosphorene has a unique set of characteristics such as a semiconducting nature, good carrier mobility and low-spin orbit coupling aspects which makes it a highly prospective two dimensional material for cross-hybrid architectures in nanoelectronics, spintronics, and optoelectronics. In the spintronic context, the creation of a stable magnetic order in phosphorene can be immensely beneficial for designing phosphorene spin circuits. In this work, we present high efficiency spin filtering behaviour in magnetically rendered phosphorene. First, we calculate the effect of doping various 3d block elements in phosphorene to introduce a stable magnetic order. Next, by varying doping concentrations in distinct doping configurations, an extensive phase diagram has been obtained depicting the presence of various electronic and magnetic states. This allows us to achieve a high magnetisation in the presence of various transition metal atoms, with a spin polarisation of ∼100% in half-metallic regimes. The transport behaviour reveals a map of the spin injection efficiency showing enhancement with doping concentration and reaching a perfect spin filtering capacity of ∼100% in the presence of Ti, Cr, Mn, Co, and Fe atoms. The present results offer new insights into engineered designs of multi-functional phosphorene spintronic circuits.
磷烯具有一系列独特的特性，如半导体性质、良好的载流子迁移率和低自旋轨道耦合特性，这使其成为纳米电子学、自旋电子学和光电子学中用于交叉混合架构的极具前景的二维材料。在自旋电子学背景下，在磷烯中创建稳定的磁序对于设计磷烯自旋电路可能极为有益。在这项工作中，我们展示了磁性磷烯中的高效自旋过滤行为。首先，我们计算了在磷烯中掺杂各种3d族元素以引入稳定磁序的效果。接下来，通过在不同的掺杂构型中改变掺杂浓度，获得了一个广泛的相图，描绘了各种电子和磁态的存在。这使我们能够在存在各种过渡金属原子的情况下实现高磁化强度，在半金属状态下自旋极化率约为100%。输运行为揭示了自旋注入效率的图谱，表明其随掺杂浓度增强，并且在存在Ti、Cr、Mn、Co和Fe原子的情况下达到约100%的完美自旋过滤能力。目前的结果为多功能磷烯自旋电子电路的工程设计提供了新的见解。
