Transient dynamics of spin-polarized injection in helical Luttinger liquids
Abstract
We analyze the time evolution of spin-polarized electron wave packets injected into the edge states of a two-dimensional topological insulator. In the presence of electron interactions, the system is described as a helical Luttinger liquid and injected electrons fractionalize. However, because of the presence of metallic detectors, no evidences of fractionalization are encoded in dc measurements, and in this regime the system do not show deviations from its non-interacting behavior. Nevertheless, we show that the helical Luttinger liquid nature emerges in the transient dynamics, where signatures of charge/spin fractionalization can be clearly identified.
Keywords
Cite
@article{arxiv.1511.00430,
title = {Transient dynamics of spin-polarized injection in helical Luttinger liquids},
author = {Alessio Calzona and Matteo Carrega and Giacomo Dolcetto and Maura Sassetti},
journal= {arXiv preprint arXiv:1511.00430},
year = {2015}
}
Comments
Contribution for the special issue of Physica E in memory of Markus B\"uttiker. 4 figures