We investigate an inhomogeneous one-dimensional nanosystem coupled to macroscopic leads of different temperatures. In particular, we consider a system with an impurity with on-site scattering potential located in the middle of the nanowire. Such an impurity produces oscillations of the density of carriers in its vicinity, the so-called Friedel oscillations.
In the equilibrium case these oscillations are symmetric with respect to the position of the impurity. Here, we demonstrate that strongly asymmetric Friedel oscillations occur if the system is far from the equilibrium. We discuss how this asymmetry depends on the model parameters and the difference of the temperatures of the leads (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)