Anomalous Hall effect from gapped nodal line in Co2FeGe Heusler compound

Gaurav K. Shukla; Jyotirmay Sau; Nisha Shahi; Anupam K. Singh; Manoranjan Kumar; Sanjay Singh

doi:10.1103/PhysRevB.104.195108

Anomalous Hall effect from gapped nodal line in Co2FeGe Heusler compound

Materials Science 2021-11-17 v1

Authors: Gaurav K. Shukla , Jyotirmay Sau , Nisha Shahi , Anupam K. Singh , Manoranjan Kumar , Sanjay Singh

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Abstract

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.

Keywords

anomalous hall effect heusler compound gapped nodal line berry curvature weyl fermions first-principles calculation

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@article{arxiv.2110.10677,
  title  = {Anomalous Hall effect from gapped nodal line in Co2FeGe Heusler compound},
  author = {Gaurav K. Shukla and Jyotirmay Sau and Nisha Shahi and Anupam K. Singh and Manoranjan Kumar and Sanjay Singh},
  journal= {arXiv preprint arXiv:2110.10677},
  year   = {2021}
}

Anomalous Hall effect from gapped nodal line in Co2FeGe Heusler compound

Abstract

Keywords

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