Thermoelectric effects in electron chiral tunneling in metallic carbon nanotubes

被引：1
|
作者：
Parafilo, A. V. [1 ]
Ilinskaya, O. A. [1 ]
Krive, I. V. [1 ,2 ,3 ,4 ]
Park, Y. W. [3 ]
机构：
[1] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[2] Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden
[3] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea
[4] Kharkov Natl Univ, Dept Phys, UA-61077 Kharkov, Ukraine
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2015年 / 88卷
关键词：
Single-walled carbon nanotube; Chiral tunneling; Thermopower; Figure-of-merit; THERMAL CONDUCTANCE; TRANSPORT; THERMOPOWER; SCATTERING; QUANTUM; FIGURE;
D O I：
10.1016/j.spmi.2015.08.029
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Thermoelectric effects in a metallic single-wall carbon nanotube in the presence of long-range electrostatic and pseudomagnetic potentials (produced by strain) are considered. It is shown that for strong scattering potentials (chiral tunneling) a pronounced energy "gap" appears in the energy dependence of electron transmission coefficient. This results in strong violation of Wiedemann-Franz law and in a peak-like behavior of thermopower as a function of chemical potential. The electronic figure-of-merit (ZT) is calculated and shown to be sensitive at low temperatures to nanotube chirality. By tuning chemical potential, ZT can reach high values (ZT approximate to 5) that makes specially engineered nanotube-based thermocouple to be a promising nano-device with a high thermoelectric performance. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：72 / 79
页数：8
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