Magnetotransport and angle-resolved photoemission spectroscopy of MnSb 12 Te 19 : a new member of MnSb2nTe3n+1family.

The quest for intrinsically ferromagnetic topological materials is a focal point in the study of topological phases of matter, as intrinsic ferromagnetism plays a vital role in realizing exotic properties such as the anomalous Hall effect (AHE) in quasi-two-dimensional materials, and this stands out as one of the most pressing concerns within the field. Here, we investigate a novel higher order member of the MnSb2nTe3n+1family, MnSb ₁₂ Te ₁₉ , for the first time combining magnetotransport and angle-resolved photoemission spectroscopy (ARPES) measurements. Our magnetic susceptibility experiments identify ferromagnetic transitions at temperature T _c = 18.7 K, consistent with our heat capacity measurements ( T = 18.8 K). The AHE is observed for the field along the c -axis below T _c . Our study of Shubinikov-de-Haas oscillations provides evidence for Dirac fermions with π Berry phase. Our comprehensive investigation reveals that MnSb ₁₂ Te ₁₉ exhibits a FM ground state along with AHE, and hole-dominated transport properties consistent with ARPES measurements.
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