偶奇链依赖旋转切换现象在齐克扎克和扶手椅β-石墨烯纳米丝带铁磁连接处β-石墨烯纳米丝带铁磁连接处
1Department of Applied Physics, College of Science, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
Journal of physics. Condensed matter : an Institute of Physics journal
|November 26, 2025
概括
这项研究探讨了使用β-石墨烯纳米带 (GYNR) 的旋转切换设备. 研究人员发现,旋转切换发生在齐克扎克和扶手椅边缘的GYNR连接处,为新的旋转电子设备提供了潜力.
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
- 纳米技术纳米技术
背景情况:
- 石墨烯的独特电子特性,如克莱恩道化,对旋转电子设备应用提出了挑战.
- 超薄材料为探索量子现象和设备功能提供了新的平台.
研究的目的:
- 从理论上研究基于β-石墨烯纳米带 (GYNR) 的铁磁交叉点中的旋转切换现象.
- 探索边缘类型 (齐格扎克和扶手椅) 和设备参数对旋转运输的影响.
- 为了确定GYNR对石墨烯的潜在优势,用于自旋电子应用.
主要方法:
- 电子结构计算的紧密约束近似值.
- 凯尔迪什·格林 (Keldysh Green) 的函数方法用于模拟旋转运输.
- 齐克扎克和扶手椅边缘β-GYNR铁磁连接的理论建模.
主要成果:
- 在两种偶链齐克扎克边缘和扶手椅形状的β-GYNR连接处都观察到旋转切换.
- 齐克扎格GYNR的旋转切换机制归因于山谷效应,而在扶手椅GYNR中,这是由于带间隙.
- 旋转传输可以通过门电压调节,影响导体-绝缘体过渡,并受到边缘结构,链条长度,费米能量和磁化的影响.
结论:
- 与石墨烯相比,β-石墨烯纳米带表现出明显的自旋切换行为,可能克服克莱恩道制造的局限性.
- 这些发现表明β-GYNR连接是开发新型自旋切换器件的有希望的候选人.
- 这项研究为制造使用β-石墨烯纳米丝带的先进的自旋电子元件提供了理论基础.
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