Frequency dependent transport through a spin chain
Abstract
Motivated by potential applications in spintronics, we study frequency dependent spin transport in nonitinerant one-dimensional spin chains. We propose a system that behaves as a capacitor for the spin degree of freedom. It consists of a spin chain with two impurities a distance apart. We find that at low energy (frequency) the impurities flow to strong coupling, thereby effectively cutting the chain into three parts, with the middle island containing a discrete number of spin excitations. At finite frequency spin transport through the system increases. We find a strong dependence of the finite frequency characteristics both on the anisotropy of the spin chain and the applied magnetic field. We propose a method to measure the finite-frequency conductance in this system.
Keywords
Cite
@article{arxiv.1111.4803,
title = {Frequency dependent transport through a spin chain},
author = {Kevin A. van Hoogdalem and Daniel Loss},
journal= {arXiv preprint arXiv:1111.4803},
year = {2015}
}