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

This study presents a systematic investigation of Mn$_{1-x}$Pb$_{x}$(Bi$_{1-y}$Sb$_{y}$)$_{2}$Te$_{4}$ 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.

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Publication Details

Journal
Physical Review Materials
Published
2026-11-04
DOI
https://doi.org/10.1103/v9dd-m7bh
Primary Topic
Topological Materials and Phenomena
Type
article
Field-Weighted Citation Impact
0.00

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article

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

T. P. Makarova, Dmitry A. Estyunin, K. A. Kokh, Alexander M. Shikin et al.
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Physical Review Materials
Topological Materials and Phenomena
article

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

T. P. Makarova, Dmitry A. Estyunin, K. A. Kokh, Alexander M. Shikin, V. A. Golyashov, K. Shimada, Y S S S Santosh Kumar, O. E. Tereshchenko, S. Ideta, A. S. Frolov
article en

Abstract

This study presents a systematic investigation of Mn$_{1-x}$Pb$_{x}$(Bi$_{1-y}$Sb$_{y}$)$_{2}$Te$_{4}$ 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.

Physical Review MaterialsVol. 10(11)
Hiroshima University (JP), Russian Academy of Sciences (RU), Moscow Institute of Physics and Technology (RU), St Petersburg University (RU), Boreskov Institute of Catalysis (RU), V.S. Sobolev Institute of Geology and Mineralogy (RU), Institute of Semiconductor Physics (RU)
Siberian Branch, Russian Academy of Sciences, Saint Petersburg State University
Openalex Percentile: Top 58%
Topological Materials and Phenomena
DOIOpen Access PDFOpenAlex
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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 — T. P. Makarova, Dmitry A. Estyunin, et al. · Physical Review Materials (2026) | TGRS Research Map | TGRS