Role of electron-electron interactions in electron emission from nanotube materials
Role of electron-electron interactions in electron emission from nanotube materials
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DOI：
10.1103/physrevmaterials.8.016003
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发表时间：
2024-01-29
影响因子：
3.4
通讯作者：
Chudzinski，Piotr
中科院分区：
文献类型：
--
作者：
Grigoryan，Naira;Chudzinski，Piotr
纳米管和纳米棒最近已经被确立为在场发射（FE）过程中用作电子源的非常好的材料。这些都是一维材料，电子-电子相互作用预计将在其物理学中发挥至关重要的作用。本文研究了电子-电子相互作用对场发射的影响。我们在低能区研究这个问题;因此我们需要放弃反绝热近似，推导出隧道过程有限持续时间的隧道振幅。在本文中，我们确定了参数时，隧道电流的精确解析表达式可以给出。我们得到的形式主义，使人们能够捕捉在同一时间的集体效应，由于电子-电子相互作用和电子发射。我们的研究结果表明，不同类型的纳米管，和他们的minigap/压缩性参数，可以很容易地区分基于这些材料的FE测量。
Nanotubes and nanorods have been recently established as very good materials to work as electron sources in a field emission (FE) process. These are one-dimensional materials and electron-electron interactions are expected to play a crucial role in their physics. Here we study the influence of electron-electron interactions on the field emission. We study the problem in the low energy regime; thus we need to abandon the antiadiabatic approximation and derive tunneling amplitude for a finite duration of the tunneling process. In this work we identified the parameters when exact analytic expression for tunneling current can be given. We obtained formalism that enables one to captureat the same timethe collective effects due to electron-electron interactions and thermionic emission. Our results reveal that different types of nanotubes, and their minigap/compressibility parameters, can be easily distinguished based on FE measurements on these materials.