Kohler’s rule and anisotropic Berry-phase effect in nodal-line semimetal ZrSiSe

Abstract

Nodal-line semimetals, ZrSiX (X = S, Se, Te), provide an ideal platform to investigate the tunable Fermi surfaces by replacing chalcogens. Here, we study the magnetoresistance at various magnetic fields and temperatures in ZrSiSe and find the obedience of Kohler’s law and sigmoidal-shaped field dependence, which are different to the behavior reported in ZrSiS. This difference is caused by compensated carriers and the non-negligible contribution from the trivial band in ZrSiSe. Furthermore, an anisotropic Berry-phase effect is observed and can be attributed to the enhanced spin–orbit coupling and the effect of a trivial band induced by Se replacement. Our findings provide further understanding for the topological states in nodal-line semimetal ZrSiX families and reveal the potential applications on magnetic sensors by manipulating the topological states.