High Mobility Charge Transport in a Multicarrier Altermagnet CrSb
arxiv(2024)
摘要
A newly identified magnetic phase called altermagnet is being actively
studied because of its unprecedented spin-dependent phenomena. Among the
candidate materials, CrSb has a particularly high transition temperature and a
large spin-splitting energy, but its transport properties have remained
unexplored. In this study, we report the magnetotransport properties of CrSb
measured on single crystals. We found that the Hall resistivity shows a
nonlinear dependence on the magnetic field at low temperatures. From
symmetry-based considerations, however, this behavior can not be attributed to
an anomalous Hall effect, but to a multicarrier effect. A multicarrier fitting
to the in-plane conductivity tensor revealed that there are carriers with high
mobilities in CrSb, probably because of the presence of Weyl points in the
electronic structure.
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