High mobility charge transport in a multicarrier altermagnet CrSb
Takahiro Urata, Wataru Hattori, Hiroshi Ikuta
Abstract
Altermagnets are unconventional type of magnetic materials with intriguing properties. CrSb is particularly important because of its high ordering temperature and large spin-splitting energy. Here, the authors measured the magnetotransport properties of CrSb. Employing focused-ion-beam machining, they prepared micro-sized lamellar samples to measure all independent Hall tensor components. The Hall resistivity was highly non-linear at low temperatures, but an anomalous Hall effect was ruled out by symmetry-based considerations. Instead, the magnetotransport properties are well explained by a multicarrier effect. Notably, the analysis revealed the presence of carriers with the highest mobility reported for altermagnets so far.