Components which show I–V graphs that are not straight lines are non-linear circuit elements. The current through them is not directly proportional to the potential difference across them.

Components which show I–V graphs that are not straight lines are non-linear circuit elements. The current through them is not directly proportional to the potential difference across them.

The article describes a series of experiments in which the material developed a preference for current to flow in ... alters the asymmetric pinning potential so that vortices remain more stuck ...