2003/06/06 by A. Wahl, Silvana Mercone, S. Mercone +4 · 2 citations
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #Magnetic and transport properties of perovskites and related materials #Solid-state spectroscopy and crystallography #cond-mat
paper · pdf · doi:10.1103/physrevb.68.094429
13 pages, 6 figures
arxiv created 2003/06/06 · openalex publication_date 2003/09/25 · arxiv updated 2009/11/30 · openalex created_date 2017/02/10 · openalex updated_date 2026/07/30
Nonlinear conduction in a charge-ordered manganese oxide Pr0.63Ca0.37MnO3 is reported. To interpret such a feature, it is usually proposed that a breakdown of the charge or orbitally ordered state is induced by the current. The system behaves in such a way that the bias current may generate metallic paths, giving rise to a resistivity drop. One can describe this feature by considering the coexistence of localized and delocalized electron states with independent paths of conduction. This situation is reminiscent of what occurs in charge-density-wave systems where a similar nonlinear conduction is also observed. In light of recent experimental results suggesting the development of charge density waves in charge and orbitally ordered manganese oxides, a phenomenological model for charge-density-wave motion is used to describe the nonlinear conduction in Pr0.63Ca0.37MnO3. In such a framework, the nonlinear conduction arises from the motion of the charge-density-wave condensate which carries a net electrical current.