2021/10/20 by Gaurav K. Shukla, Gaurav Shukla, Jyotirmay Sau +5 · 49 citations
Materials Science · Mathematics · Physics and Astronomy · #Berry connection and curvature #Condensed matter physics #Electrical resistivity and conductivity #Fermion #Geometric phase #Geometry #Graphene research and applications #Hall effect #Heusler alloys: electronic and magnetic properties #Line (geometry) #Mathematics #Physics #Quantum mechanics #Symmetry (geometry) #Topological Materials and Phenomena #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.104.195108
published in Physical review. B./Physical review. B 104(19) (American Physical Society)
arxiv created 2021/10/20 · openalex publication_date 2021/11/05 · arxiv updated 2021/11/17 · openalex created_date 2021/11/22 · openalex updated_date 2026/07/31
Full Heusler compounds with cobalt as a primary element show anomalous transport properties owing to the Weyl fermions and broken time-reversal symmetry. We present here the study of anomalous Hall effect (AHE) in the Co2FeGe Heusler compound. The experiment reveals anomalous Hall conductivity (AHC) \ensuremath∼100 S/cm at room temperature with an intrinsic contribution of \ensuremath∼78 S/cm. The analysis of anomalous Hall resistivity suggests the scattering independent intrinsic mechanism dominates the overall behavior of anomalous Hall resistivity. The first principles calculation reveals that the Berry curvature originated by a gapped nodal line near EF is the main source of AHE in the Co2FeGe Heusler compound. The theoretically calculated AHC is in agreement with the experiment.