外延石墨烯纳米带中纯自旋流的实现  

Generating Pure Spin Current in Epitaxial Graphene Nanoribbons

作　　者：陈兴[1] CHEN Xing(School of Electronic Science and Applied Physics,Hefei University of Technology,Hefei 230601,China)

机构地区：[1]合肥工业大学电子科学与应用物理学院,安徽合肥230601

出　　处：《通信电源技术》2021年第4期8-11,16,共5页Telecom Power Technology

摘　　要：基于热自旋电子学制造的器件具有性能高、能耗低以及集成度高等特点,采用第一性原理计算的方法对体系进行研究,建立了在铁磁态石墨烯纳米带两个边缘外延出相同等腰三角形结构以获得纯自旋流的模型。计算结果表明,对该结构施加温度场可以驱动器件中的不同自旋电子向相反方向运动,形成自旋流和电荷流,微调器件的化学势可以实现电荷流为0,自旋流不为0的纯自旋流。这一研究结果为纯自旋流器件的设计提供了理论依据。The devices based on spin caloritronics shows excellent performance,such as high speed,low energy consumption and high integration etc.In this paper,based on the first-principle calculation,we propose a scheme for generating pure spin current in the zigzag-edged graphene nanoribbons with epitaxial isosceles triangle structure on the two edges.The results show that the electrons of the two spin channels flow in opposite directions under a temperature gradient,generating the spin current and charge current.By slightly tuning the chemical potential of the device,the charge current can be zero,while the spin current remains.The results provide a theoretical basis for the design of pure spin current devices.

关 键 词：热自旋电子学 纯自旋电流 密度泛函理论 

分 类 号：TQ127.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]