Abstract
In this work, we present a study on the dielectric response and electron transport of CdSe nanoribbons via terahertz (THz) time-domain spectroscopy (TDS). The observed spectrum can be described well using a Drude–Smith model combined with a Lorentz oscillator. The origins of the obtained physical parameters are studied in detail. We found that the broad surface depletion region in nanostructures could highly affect the electron transport. In addition, the transverse optical phonon mode is directly revealed in the spectrum. This phonon vibration could significantly influence the free carrier scattering. This result provides direct evidence for the contribution of electron-phonon interaction to the electronic properties of CdSe nanoribbons.
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