Fermi Surface Structure Revealed by Quantum Oscillations in Half‐Heusler Semimetal LuAuSn

ABSTRACT The Fermi surface structure in the half‐Heusler semimetallic compound LuAuSn was systematically investigated using quantum oscillation studies of high‐quality single crystals and first‐principles calculations. Clear bulk quantum oscillation signals were observed for multiple complementary physical properties, including magnetization, Hall resistance, and dynamic magnetostrictive coefficient. Quantum oscillations measured in a strong magnetic field (up to 35 T) confirmed the existence of four hole pockets and two electron pockets. Furthermore, spin splitting caused by spin–orbit coupling was discovered in the hole pockets. Our findings revealed the detailed topology of the Fermi surface in LuAuSn, which may help improve understanding of the electronic transport in this and related half‐Heusler materials.