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在单层拓绝缘体Bi₄Br₄基装置中,在高空位度下,无消耗边缘运输

Md Niloy Khan^1,2, Mahbub Alam¹

¹Department of Electrical & Electronic Engineering, Bangladesh University of Engineering & Technology, Dhaka 1000, Bangladesh.

Journal of physics. Condensed matter : an Institute of Physics journal

|March 26, 2025

概括

单层比斯木单化物 (SL-Bi4Br4) 纳米丝带表现出强大,拓保护的边缘状态,耐损坏. 这些特性使得SL-Bi4Br4成为未来电子和自旋电子设备的有希望的材料.

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
量子化学是一个量子化学.

背景情况:

单层石单化物 (SL-Bi4Br4) 是一个经过实验验证的室温量子旋转霍尔绝缘体.
它具有显著的散带间隙,表明电子应用的潜力.

研究的目的:

研究SL-Bi4Br4及其纳米丝带 (SL-Bi4Br4NR) 的电子特性.
分析空位缺陷对SL-Bi4Br4纳米带的拓边缘状态的影响.
评估SL-Bi4Br4在下一代电子和自旋电子设备中的潜力.

主要方法:

利用最大局部化的Wannier函数 (MLWF) 来构建一个哈密尔顿式.
使用非平衡格林函数 (NEGF) 与MLWF结合使用.
模拟SL-Bi4Br4纳米带的电子特性,具有不同的空位缺陷.

主要成果:

SL-Bi4Br4纳米带边缘状态在拓上受到保护,并且对混乱有强大的抵抗力.
在SL-Bi4Br4设备中,通过边缘状态的传输保持量子化,不受宽度增加的影响.
缺陷和增加的通道长度主要影响散装状态传输,而不是边缘状态.

结论:

SL-Bi4Br4表现出对混乱的显著弹性,保持量子化边缘状态传输.
该材料的拓保护和强度使其成为先进电子和自旋电子应用的强大候选者.
对SL-Bi4Br4的进一步研究可能会为新型设备功能铺平道路.

关键词:

在 DFT 方面,它是最重要的.电子结构电子结构在 NEGF 基金中,量子运输是一种量子运输.拓绝缘器拓绝缘器拓绝缘器空缺缺陷是空缺缺陷的原因之一.

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