arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1010.0660cond-mat.mes-hall
收藏

单壁碳纳米管中电子系统的能量损失

Energy loss of the electron system in individual single-walled carbon nanotubes

Daniel F. Santavicca, Joel D. Chudow, Daniel E. Prober, Meninder S. Purewal, Philip Kim

摘要:

我们表征了低温下单个金属单壁碳纳米管中非平衡电子系统的能量损失。使用约翰逊噪声测温法,我们证明,对于欧姆接触的纳米管,直流电阻在有限的偏置电流直接反映了平均电子温度。这使得能够直接确定与纳米管电子系统的冷却相关联的热导率。在分析温度和长度依赖的热导,我们考虑的贡献,从声学声子发射,光学声子发射,和热电子外扩散。

英文摘要:

We characterize the energy loss of the non-equilibrium electron system in individual metallic single-walled carbon nanotubes at low temperature. Using Johnson noise thermometry, we demonstrate that, for a nanotube with ohmic contacts, the dc resistance at finite bias current directly reflects the average electron temperature. This enables a straightforward determination of the thermal conductance associated with cooling of the nanotube electron system. In analyzing the temperature- and length-dependence of the thermal conductance, we consider contributions from acoustic phonon emission, optical phonon emission, and hot electron outdiffusion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑