基于烯纳米带的自旋场效应晶体管中的超快速切换
Farzaneh Ghasemzadeh1, Mohsen Farokhnezhad2, Mahdi Esmaeilzadeh1
1Department of Physics, Iran University of Science and Technology, Narmak, Tehran 16844, Iran. mahdi@iust.ac.ir.
Physical chemistry chemical physics : PCCP
|April 17, 2024
概括
烯纳米带使得超快速的自旋电子学成为可能. 这项研究表明,烯自旋场效应晶体管 (FET) 比石墨烯或 FET 提供更好的自旋过和更高的电流.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 这就是Spintronics.
背景情况:
- 烯具有很高的载体移动性和很长的自旋相干长度,这使得它对超快速的自旋电子有很大的希望.
- 场效应晶体管 (FET) 是自旋电子器件中的关键组件.
研究的目的:
- 调查基于扶手椅β12-烯纳米丝带 (BNRs) 的Datta-Das FET的自旋依赖导电性.
- 在Rashba旋转轨道合 (SOC) 下分析设备的性能作为可调的旋转波器.
主要方法:
- 使用紧密结合 (TB) 汉密尔顿式和非平衡格林函数 (NEGF) 方法进行计算.
- 模拟自旋FETs与铁磁 (FM) 绝缘电极并行和反并行配置.
- 嵌入Rashba旋转轨道合 (SOC) 和电子-电子 (e-e) 相互作用.
主要成果:
- 烯旋转FET作为可控制的旋转过器,由门电压和Rashba SOC强度调节.
- 在反平行配置中出现能量差距,这些配置可以是自旋依赖的.
- 电子-电子相互作用增强了自旋前行,并加强了Rashba SOC效应.
- 与石墨烯和同行相比,旋FET显示出明显更高的电流大小和Ion/Ioff比率.
结论:
- 扶手椅β12-烯纳米丝带对于超快速的自旋电子应用非常有效.
- 门电压为当前电压特征和旋转过提供调整性.
- 在关键性能指标中,基旋转FET显著优于石墨烯和基旋转FET.
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