Microscopic mechanisms of dephasing due to electron-electron interactions
摘要
We develop a non-perturbative numerical method to study tunneling of a single electron through an Aharonov-Bohm ring where several strongly interacting electrons are bound. Inelastic processes and spin-flip scattering are taken into account. The method is applied to study microscopic mechanisms of dephasing in a non-trivial model. We show that electron-electron interactions described by the Hubbard Hamiltonian lead to strong dephasing: the transmission probability at flux is high even at small interaction strength. In addition to inelastic scattering, we identify two energy conserving mechanisms of dephasing: symmetry-changing and spin-flip scattering. The many-electron state on the ring determines which of these mechanisms will be at play: transmitted current can occur either in elastic or inelastic channels, with or without changing the spin of the scattering electron.
引用
@article{arxiv.cond-mat/0305335,
title = {Microscopic mechanisms of dephasing due to electron-electron interactions},
author = {R. Zitko and J. Bonca},
journal= {arXiv preprint arXiv:cond-mat/0305335},
year = {2016}
}
备注
11 pages, 16 figures Submitted to Phys. Rev. B