%0 Journal Article
%T Charge and spin density in the helical Luttinger liquid
%A N. Traverso Ziani
%A C. Fleckenstein
%A F. Cr¨¦pin
%A B. Trauzettel
%J Physics
%D 2015
%I arXiv
%X The weakly interacting helical Luttinger liquid, due to spin momentum locking, is characterized by extremely peculiar local observables: we show that the density-density correlation functions do not exhibit signatures of Friedel and Wigner oscillations, and that spin-spin correlation functions, which are strongly anisotropic, witness the formation of a planar spin wave. Moreover, we demonstrate that the most relevant scattering potentials involving a localized impurity are not able to modify the electron density, while only magnetic impurities can pin the planar spin density wave.
%U http://arxiv.org/abs/1511.03157v1