Optical Phonon Scattering Dominated Transport in Individual Suspended Carbon Nanotubes,Physica Status Solidi (B) - Basic Solid State Physics

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Optical Phonon Scattering Dominated Transport in Individual Suspended Carbon Nanotubes
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2020-05-30 , DOI: 10.1002/pssb.202000103
Xinhe Yang ₁ , Peng Liu ₁ , Xinhe Wang ₂ , Jiangtao Wang ₁ , Lina Zhang ₁ , Xiang Jin ₁ , Shiwei Lv ₁ , Yang Wu ₁ , Qunqing Li ₁ , Shoushan Fan ₁ , Kaili Jiang ₁

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The transport property of six types of individual carbon nanotubes (CNT) with specified chiral indices at high temperature is investigated on a home‐made apparatus. It is found that the resistivity of all individual CNTs increases with temperature monotonically, whereas the mobility decreases with temperature and follows different laws in different temperature ranges. The carrier concentration increases exponentially with −1/T. The mobility of CNT deviates from traditional trends with temperature, T^−β, at high temperature (1070–1728 K). This deviation is attributed to scattering with optical phonons at high temperature. The data show that the electron‐optical phonon interaction becomes dominant in the temperature range of 1070–1362 K for all measured CNTs. Finally, result within a polaron model is discussed.

中文翻译：

单个悬浮碳纳米管中光子的声子散射占主导地位。

在自制设备上研究了六种具有指定手性指数的碳纳米管（CNT）在高温下的传输性能。发现所有单个CNT的电阻率均随温度单调增加，而迁移率随温度而降低并在不同温度范围内遵循不同的规律。载流子浓度以-1 / T指数增加。碳纳米管的迁移率随温度T ^-^β偏离传统趋势，高温（1070–1728 K）。该偏差归因于在高温下光子的散射。数据显示，对于所有测得的CNT，电子-光子声子相互作用在1070–1362 K的温度范围内均占优势。最后，讨论了极化子模型中的结果。

更新日期：2020-05-30

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