Resistividad independiente de la temperatura de impurezas no magnéticas (s-p) y magnéticasde tierras raras diluı́das en metales de transición

RAMUNNI, VIVIANA PATRICIA; AMÓS TROPER

Córdoba

Congreso; AFA 2021; 2021

FAMAF

In this work, we study the temperature independent resistivity of s-p impurities and magnetic heavy rareearth impurities (Gd, Tb, Dy) diluted in transition hosts, using a T -matrix formulation in a hybridized two-band system. We consider that the conduction is entirely due to s-electrons and that the screeningof the charge difference induced by the impurities is made by the d-electrons. In particular, within our picture, one has the possibility of separating d − d impurity induced scattering effects from s − d impurity induced ones. We take into account the translational symmetry breaking and therefore a non local charge potential is obtained, which can be self-consistently calculated via an extended Friedel?s sum rule. The effect of volume differences between impurity and host elements is also considered in the calculation. In this way, we have submitted our theoretical predictions to experimental and ab-initio calculations check.