Quantum dephasing in carbon nanotubes due to electron-phonon coupling.
We report on the effect of electron-phonon coupling on quantum transport in carbon nanotubes. The vibrational atomic displacements as well as the electron-phonon coupling strength are introduced through a time-dependent perturbation of the pi-electron Hamiltonian. The effect of dephasing on the Kubo conductance is studied for metallic and semiconducting nanotubes, and from a phenomenological law, coherence length (time) scales are found to fluctuate within the range 10 to 150 nm (0.01 to 4 ps) depending on the energy of charge carriers and phonon amplitude.
Roche
Stephan
S
CEA/DSM/DRFMC/SPSMS/GT, Grenoble, France.
Jiang
Jie
J
Triozon
François
F
Saito
Riichiro
R