We report charge and heat transport studies in copper-intercalated topological insulator Bi2Se3 hybrid devices. Measured conductivity shows impact of quantum corrections, electron-electron and electron-phonon interactions. Our shot noise measurements reveal that heat flux displays a crossover between T2 and T4 with the increase of temperature. The results can be explained by a model of inelastic electron scattering on disorder, increasing the role of transverse acoustic phonons in the electron-phonon coupling process.
@article{arxiv.2202.12320,
title = {Electron-phonon coupling in copper intercalated Bi$_{2}$Se$_{3}$},
author = {Maciej Wiesner and Kristie Koski and Antti Laitinen and Juuso Manninen and Alexander A. Zyuzin and Pertti Hakonen},
journal= {arXiv preprint arXiv:2202.12320},
year = {2022}
}