手性纳米管光电流效应中电子相互作用的表现
Manifestations of electron interactions in photogalvanic effect in chiral nanotubes
摘要：
碳纳米管提供了一个最容易实现的一维电子系统的实验。在低掺杂的实验相关制度中，由电子形成的Luttinger液体可以近似为Wigner晶体。类似晶体的电子顺序表明，纳米管表现出类似于穆斯堡尔效应的效应，其中发射光子的动量被整个晶体吸收。我们证明了手性纳米管中的圆光伏效应具有相同的性质。我们得到的光电压的频率依赖性和其奇异性在一个很宽的频率范围内的电子相关性是必不可少的。我们的预测提供了一个基础，使用光电效应作为一个新的实验探针的电子相关的纳米管。
英文摘要：
Carbon nanotubes provide one of the most accessible experimental realizations of one dimensional electron systems. In the experimentally relevant regime of low doping the Luttinger liquid formed by electrons may be approximated by a Wigner crystal. The crystal-like electronic order suggests that nanotubes exhibit effects similar to the Mössbauer effect where the momentum of an emitted photon is absorbed by the whole crystal. We show that the circular photovoltaic effect in chiral nanotubes is of the same nature. We obtain the frequency dependence of the photovoltage and characterize its singularities in a broad frequency range where the electron correlations are essential. Our predictions provide a basis for using the photogalvanic effect as a new experimental probe of electron correlations in nanotubes.
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