Impurity diffusion in a harmonic potential and nonhomogeneous temperature Berhanu Aragie, Mesfin Asfaw, Lemi Demeyu and Mulugeta Bekele Eur. Phys. J. B, 87 9 (2014) 214 Published online: 17 September 2014 DOI: 10.1140/epjb/e2014-50487-3