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Effect of uniaxial strain on the quantum conductance of finite zigzag single wall carbon nanotubes

机译：单轴应变对有限之字形单壁碳纳米管量子电导的影响

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Mechanical deformations cause to change the electronic properties in carbon nanotubes. In this paper, the uniaxial strain and length effects have been investigated on the quantum conductance of (12,0) and (8,0) finite Zigzag Single Wall Carbon Nanotubes (ZSWCNT) at Fermi energy, using the tight binding model and the Green s function techni ue. In the absence of strain, all the finite ZSWCNTs are metal because of localization. Our probes show that by controlling the uniaxial strain and carbon nanotube length, a metal-semiconductor transition occurs for (8,0) finite ZSWCNT under the compressive strain condition and the length longer than 37 A~0. However, under the all strain and length variations that investigated conditions in this paper, the localization length is longer than the length of (12,0) finite ZSWCNT, so that it remains metallic and the quantum conductance is non-zero.Some exciting applications of the correspondence between the mechanical response and the electronic transport of the carbon nanotubes are nano-electromechanical switch, sensor applications.
机译：机械变形导致改变碳纳米管中的电子性能。本文使用紧密结合模型和格林方法研究了费米能下（12,0）和（8,0）有限之字形单壁碳纳米管（ZSWCNT）的单轴应变和长度效应。功能技术。在没有应变的情况下，所有局域ZSWCNT都是金属。我们的探针表明，通过控制单轴应变和碳纳米管的长度，在压缩应变条件下（8,0）有限的ZSWCNT的长度大于37 A〜0时，会发生金属-半导体跃迁。然而，在本文研究的所有应变和长度变化条件下，局部化长度都比（12,0）有限ZSWCNT的长度长，因此它保持金属态且量子电导不为零。碳纳米管的机械响应与电子传输之间的对应关系的研究是纳米机电开关传感器的应用。

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