Frustrated Metallic Systems: A Review of Some Peculiar Behavior

Abstract

While consequences of frustration of magnetic interactions are much studied in localized spin systems, less studies have been performed on frustrated metallic systems. In this review I show that several effects due to strong frustration have also been observed in some metallic correlated systems compounds containing rare-earth or transition metal magnetic atoms. There are also effects, specific to frustrated metallic systems, which were theoretically predicted but not yet observed. This paper will review some of these aspects, concerning either the magnetically ordered systems, as the existence of mixed magnetic structures, or the anomalous Hall effect in chiral magnetic structures, or in non ordered systems, as the heavy fermion behavior or the possibility of superconductivity. The last part is devoted to the metal–insulator transition in these systems.