2025/07/07 by Freitas, G. S., Ribeiro, C. Kaufmann, Freitas, Gabriel S. +29
Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #FOS: Physical sciences #Heusler alloys: electronic and magnetic properties #Strongly Correlated Electrons (cond-mat.str-el) #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.2507.05500
openalex publication_date 2025/07/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the synthesis and physical properties of the new compound YNiSn2, which crystallizes in the orthorhombic Cmcm structure. The material exhibits semimetallic behavior and develops a giant positive magnetoresistance approaching 1200% at B = 16 T. Pronounced de Haas-van Alphen and Shubnikov-de Haas oscillations reveal a dominant quasi-two-dimensional Fermi surface with an exceptionally small cyclotron effective mass of m* = 0.08 m0, indicating light carriers and a tiny Fermi surface pocket. The strong anisotropy revealed by Shubnikov-de Haas quantum oscillation measurements highlights the low-dimensional electronic character of YNiSn2, positioning it as a promising Dirac semimetal candidate.