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October 8, 2025Open Access

Topological phase control in Mn1-xGexBi2Te4 via spin-orbit coupling and magnetic configuration engineering

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Authors

ASA. M. ShikinSt Petersburg UniversityNZN. L. ZaitsevRussian Academy of SciencesAEA. V. EryzhenkovSt Petersburg University

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Overview

Density functional theory reveals topological phase transitions in Mn1-xGexBi2Te4, highlighting spin-orbit coupling and magnetic ordering.

Key Points

  • Emergence of a Weyl semimetal phase is linked to the crossing of bands with opposite spin projections along the ΓZ direction.
  • Modulating spin-orbit coupling and strain can convert Weyl points into trivial or insulating phases, influencing electronic properties.
  • Local asymmetry in Mn/Ge substitution can induce a Weyl state in antiferromagnetic systems, modifying interlayer coupling.
  • Partial substitution of Mn and Te is proposed to optimize Weyl point separation and enhance the anomalous Hall effect.

Cite This Study

Shikin et al. (2025) studied this question.

synapsesocial.com/papers/68e6d7971ffa7aa7d63d1801https://doi.org/10.48550/arxiv.2506.00511
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