Friedel oscillations in the presence of far from equilibrium heat transport

摘要

We investigate an inhomogeneous one-dimensional nanosys-tem coupled to macroscopic leads of different temperatures. Inparticular, we consider a system with an impurity with on-sitescattering potential located in the middle of the nanowire. Suchan impurity produces oscillations of the density of carriers inits vicinity, the so-called Friedel oscillations.In the equilibrium case these oscillations are symmetric withrespect to the position of the impurity. Here, we demonstratethat strongly asymmetric Friedel oscillations occur if the sys-tem is far from the equilibrium. We discuss how this asymme-try depends on the model parameters and the difference of thetemperatures of the leads.