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Anomalous Hall effect from gapped nodal line in Co2FeGe Heusler compound

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arxiv 2110.10677 v1 pith:PYL6BPWI submitted 2021-10-20 cond-mat.mtrl-sci

Gaurav K. Shukla , Jyotirmay Sau , Nisha Shahi , Anupam K. Singh , Manoranjan Kumar , Sanjay Singh This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords anomaloushallheuslerco2fegecompoundeffectexperimentgapped
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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 Co2FeGe Heusler compound. The experiment reveals anomalous Hall conductivity (AHC) 100 S/cm at room temperature with an intrinsic contribution of 78 S/cm . The analysis of anomalous Hall resistivity suggests the scattering independent intrinsic mechanism dominates the overall behaviour of anomalous Hall resistivity. The first principles calculation reveals that the Berry curvature originated by gapped nodal line near EF is the main source of AHE in Co2FeGe Heusler compound. The theoretically calculated AHC is in agreement with the experiment.

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