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在Bi₂Te₃的表面运输的定位和方向性有序的3D纳米网络

Alejandra Ruiz-Clavijo¹, Nicolás Pérez², Olga Caballero-Calero¹

¹Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM+CSIC) Isaac Newton 8, E-28760, Tres Cantos, Madrid, Spain.

|July 6, 2023

概括

3D-Bi₂Te₃纳米线纳米网络的电阻显示安德森定位低于50K. 弱反定位表示沿垂直纳米线方向运输,增强Seebeck系数.

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:

了解纳米结构材料中的电子运输对于热电应用至关重要.
石棉化物 (Bi₂Te₃) 纳米线是有前途的热电材料.
维度和形态对电子定位的影响是一个活跃的研究领域.

研究的目的:

在低温下研究3D-Bi₂Te₃纳米线纳米网络的电阻和磁阻.
了解底层的电子传输机制和局部化效应.
为了将运输特性与热电性能相关联.

主要方法:

低温电阻测量. 低温电阻测量.
取决于角度的磁电阻测量.
使用安德森模型进行本地化和Hikami-Larkin-Nagaoka模型进行分析.

主要成果:

阻力增加到50K以下,这与安德森在平行通道中的定位一致.
观察到微弱的反局部化,表明沿垂直纳米线轴进行运输.
确定一致度长度:跨纳米线的~700nm,沿单个纳米线的~100nm.
定位效应与增强的西贝克系数相关.

结论:

在3D-Bi₂Te₃纳米线纳米网络中,电子运输受局部化现象的控制.
纳米网络结构促进了独特的传输路径,影响了连贯长度.
观察到的本地化效应是纳米网络增强的Seebeck系数的一个关键因素.

关键词:

3D-AAO 3D-AAO 在线观看毕斯穆特化物化物.局部化效应是局部化的效应.超材料是指金属材料.纳米网络是一个纳米网络.地表运输地表运输地表运输

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