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Optical conductivity of one-dimensional narrow-gap semiconductors

Hyun C. Lee
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Abstract

The optical conductivities of two one-dimensional narrow-gap semiconductors, anticrossing quantum Hall edge states and carbon nanotubes, are studied using bosonization method. A lowest order renormalization group analysis indicates that the bare band gap can be treated perturbatively at high frequency/temperature. At very low energy scale the optical conductivity is dominated by the excitonic contribution, while at temperature higher than a crossover temperature the excitonic features are eliminated by thermal fluctuations. In case of carbon nanotubes the crossover temperature scale is estimated to be 300 K.

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Hyun C. Lee. 2002-05-16. Optical conductivity of one-dimensional narrow-gap semiconductors. https://doi.org/10.1142/s0217979202010361

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