Effects of the electron-phonon interaction on the electron transport in low-dimensional disordered semiconductor structures

We investigate the effects of the interference between electron-phonon scattering and elastic electron scattering in heterostructures and nanotubes. Interference strongly enhances the effective electron-phonon coupling in semiconductor structures and strengthens the electron-phonon relaxation [1]. Employing the quantum transport equitation, we calculate the interference contribution to the electrical conductivity and phonon drag thermopower. Our results show that the interference term follows to the logT-law and dominates in the temperature dependence of the conductivity. Phonon drag is also enhanced due to disorder. [1] A. Sergeev et al., Phys. Rev. Lett., 94, 136602 (2005).