Quantum Oscillations in Noncentrosymmetric Weyl Semimetal SmAlSi

As a new type of quantum state matter hosting low energy relativistic quasiparticles, Weyl semimetals (WSMs) have attracted significant attention for scientific community and potential device applications. In this study, we present comprehensive investigation the structural, magnetic, transport properties noncentrosymmetric R AlSi ( = Sm, Ce), which been predicted to be magnetic WSM candidates. Both samples exhibit nonsaturated magnetoresistance, with about 900% 80% SmAlSi CeAlSi, respectively, at temperature 1.8 K field 9 T. The carrier densities CeAlSi remarkable change around transition temperatures, signifying that electronic states are sensitive ordering rare-earth elements. At reveals prominent Shubnikov-de Haas oscillations associated nontrivial Berry phase. High-pressure experiments demonstrate order is robust survival under high pressure. Our results would yield valuable insights into physics potentials in applications next-generation spintronic devices Ce) family.