Distributed Current Injection into a One-Dimensional Ballistic Edge Channel
Mesoscale and Nanoscale Physics
2025-11-03 v2
Abstract
We generalize Landauer's theory of ballistic transport in a one-dimensional (1D) conductor to situations where charge carrier injection and extraction are not any more confined to electrodes at either end of the channel, but may occur along its whole length. This type of distributed injection is expected to occur from the two-dimensional (2D) bulk of, e.g., a quantum spin (or anomalous) Hall insulator to its topologically protected edge states. We apply our conceptual solution to the case of two metal electrodes contacting the 2D bulk, enabling us to derive criteria that discriminate ballistic from resistive edge channels in multi-terminal transport experiments.
Cite
@article{arxiv.2502.17995,
title = {Distributed Current Injection into a One-Dimensional Ballistic Edge Channel},
author = {Kristof Moors and Christian Wagner and Helmut Soltner and Felix Lüpke and F. Stefan Tautz and Bert Voigtländer},
journal= {arXiv preprint arXiv:2502.17995},
year = {2025}
}
Comments
Main Text (6 pages, 3 figures) and Supplemental Material (15 pages, 4 figures)