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PreprintCC BY 4.0arXiv

Tuning topological phase and Dirac point position via Pb and Sb substitution in Mn1−xPbx(Bi1−ySby)2Te4

  • T. P. Makarova
  • D. A. Estyunin
  • V. A. Golyashov
  • K. A. Kokh
  • O. E. Tereshchenko
  • A. S. Frolov
  • S. Ideta
  • Y. Kumar
  • K. Shimada
  • A. M. Shikin
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Abstract

This study presents a systematic investigation of Mn1−xPbx(Bi1−ySby)2Te4 crystals over a wide range of concentrations (x = 10-60%, y = 5-60%). It was found that the value of the bulk band gap is determined exclusively by the Pb concentration and it closes at Pb 40-50 %, which corresponds to a topological phase transition. The position of the Dirac point is determined by the Pb/Sb ratio, rather than the absolute Sb content. The magnetic properties depend on the dilution of the Mn sublattice by Pb and are weakly sensitive to Sb. We show that the simultaneous substitution of Mn and Bi allows independent control of the topological phase and the position of the Fermi level.

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Cite

BibTeXRIS
BibTeX
@misc{makarova2026tuning,
  title = {{Tuning topological phase and Dirac point position via Pb and Sb substitution in Mn$_1-x$Pb$_x$(Bi$_1-y$Sb$_y$)$_2$Te$_4$}},
  author = {T. P. Makarova and D. A. Estyunin and V. A. Golyashov and K. A. Kokh and O. E. Tereshchenko and A. S. Frolov and S. Ideta and Y. Kumar and K. Shimada and A. M. Shikin},
  howpublished = {arXiv},
  year = {2026},
  month = jun,
  doi = {10.48550/arxiv.2606.31525},
  eprint = {2606.31525},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.31525},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Tuning topological phase and Dirac point position via Pb and Sb substitution in Mn_1−xPb_x(Bi_1−ySb_y)_2Te_4
AU  - T. P. Makarova
AU  - D. A. Estyunin
AU  - V. A. Golyashov
AU  - K. A. Kokh
AU  - O. E. Tereshchenko
AU  - A. S. Frolov
AU  - S. Ideta
AU  - Y. Kumar
AU  - K. Shimada
AU  - A. M. Shikin
PY  - 2026
DA  - 2026/06/30
PB  - arXiv
DO  - 10.48550/arxiv.2606.31525
UR  - https://arxiv.org/abs/2606.31525
AB  - This study presents a systematic investigation of Mn_1−xPb_x(Bi_1−ySb_y)_2Te_4 crystals over a wide range of concentrations (x = 10-60%, y = 5-60%). It was found that the value of the bulk band gap is determined exclusively by the Pb concentration and it closes at Pb 40-50 %, which corresponds to a topological phase transition. The position of the Dirac point is determined by the Pb/Sb ratio, rather than the absolute Sb content. The magnetic properties depend on the dilution of the Mn sublattice by Pb and are weakly sensitive to Sb. We show that the simultaneous substitution of Mn and Bi allows independent control of the topological phase and the position of the Fermi level.
ER  -