Spin current pumping in helical Luttinger liquids
Mesoscale and Nanoscale Physics
2015-06-11 v2
Abstract
We study the DC spin current induced into an unbiased quantum spin Hall system through a two-point contacts setup with time dependent electron tunneling amplitudes. By means of two external gates, it is possible to drive a current with spin-preserving and spin-flipping contributions showing peculiar oscillations as a function of pumping frequency, electron-electron interaction and temperature. From its interference patterns as a function of the Fabry-Perot and Aharonov-Bohm phases, it is possible to extract information about the helical nature of the edge states and the intensity of the electron-electron interaction.
Cite
@article{arxiv.1209.3634,
title = {Spin current pumping in helical Luttinger liquids},
author = {Dario Ferraro and Giacomo Dolcetto and Roberta Citro and Francesco Romeo and Maura Sassetti},
journal= {arXiv preprint arXiv:1209.3634},
year = {2015}
}
Comments
11 pages, 8 figures