Phonon-induced quantum diffusion in Carbon-based materials

19th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures

Rosati, R.^1 ; Dolcini, F.^1,2 ; Rossi, F.^1

Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi 24, Torino

10129, Italy^1

CNR-SPIN, Monte S.Angelo - via Cinthia, Napoli

I-80126, Italy^2

关键词: Carbon based materials;    Computational costs;    Density matrix approach;    Dephasing models;    Linear electronics;    Metallic single-walled carbon nanotubes;    non-Markovian approaches;    Quantum diffusion;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/647/1/012045/pdf
DOI  :  10.1088/1742-6596/647/1/012045

来源: IOP

【 摘 要 】

Employing as prototypical systems the metallic single-walled carbon nanotubes (SWNTs), we investigate the electronic propagation in Carbon-based materials, showing that their linear electronic spectra protect the spatial shape of electronic wavepackets from phonon- induced diffusion, up to micrometric scale already at room temperature. To this end, we employ a recently proposed nonlinear Lindblad-based density-matrix approach, which allows us to account for the interplay between phase coherence and dissipation/decoherence, avoiding both huge computational costs of non-Markovian approaches or the limitations of oversimplified dephasing models.