Modification of Topological Surface States in Novel Mn1 – xAxBi2Te4/MnBi2Te4 (A = Si, Ge, Sn, Pb) Topological Systems
Тип публикации: Journal Article
Дата публикации: 2024-03-01
scimago Q3
wos Q3
БС1
SJR: 0.312
CiteScore: 2.3
Impact factor: 1.3
ISSN: 00213640, 10906487
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The possibility of changing the bandgap value of topological surface states in materials based on the MnBi2Te4 intrinsic antiferromagnetic topological insulator is investigated using ab initio calculations. These materials are produced by the substitution of nonmagnetic chemical elements (A = Si, Ge, Sn, Pb) for magnetic metal atoms (Mn) in the surface (Mn1 – xAxBi2Te4/MnBi2Te4) septuple layer. The results exhibit a s-ignificant modulation of the bandgap in a wide range from 60 meV to 0 meV with an increase in the doping level x. Moreover, it is found that the bandgap behavior depends on a dopant. Namely, a monotonic dependence of the bandgap on x is found for Si and Ge, whereas the bandgap minimum at x = 0.75 exists for Sn and Pb. The results obtained in this work suggest that the main mechanism of the bandgap modulation in the materials under study is a change in the localization of topological surface states.
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Estyunina T. P. et al. Modification of Topological Surface States in Novel Mn1 – xAxBi2Te4/MnBi2Te4 (A = Si, Ge, Sn, Pb) Topological Systems // JETP Letters. 2024. Vol. 119. No. 6. pp. 451-457.
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Estyunina T. P., Tarasov A., Eryzhenkov A. V., Estyunin D. A., SHIKIN A. M. Modification of Topological Surface States in Novel Mn1 – xAxBi2Te4/MnBi2Te4 (A = Si, Ge, Sn, Pb) Topological Systems // JETP Letters. 2024. Vol. 119. No. 6. pp. 451-457.
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TY - JOUR
DO - 10.1134/s0021364023603706
UR - https://link.springer.com/10.1134/S0021364023603706
TI - Modification of Topological Surface States in Novel Mn1 – xAxBi2Te4/MnBi2Te4 (A = Si, Ge, Sn, Pb) Topological Systems
T2 - JETP Letters
AU - Estyunina, T. P.
AU - Tarasov, A.V.
AU - Eryzhenkov, A V
AU - Estyunin, D A
AU - SHIKIN, A. M.
PY - 2024
DA - 2024/03/01
PB - Pleiades Publishing
SP - 451-457
IS - 6
VL - 119
SN - 0021-3640
SN - 1090-6487
ER -
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@article{2024_Estyunina,
author = {T. P. Estyunina and A.V. Tarasov and A V Eryzhenkov and D A Estyunin and A. M. SHIKIN},
title = {Modification of Topological Surface States in Novel Mn1 – xAxBi2Te4/MnBi2Te4 (A = Si, Ge, Sn, Pb) Topological Systems},
journal = {JETP Letters},
year = {2024},
volume = {119},
publisher = {Pleiades Publishing},
month = {mar},
url = {https://link.springer.com/10.1134/S0021364023603706},
number = {6},
pages = {451--457},
doi = {10.1134/s0021364023603706}
}
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Estyunina, T. P., et al. “Modification of Topological Surface States in Novel Mn1 – xAxBi2Te4/MnBi2Te4 (A = Si, Ge, Sn, Pb) Topological Systems.” JETP Letters, vol. 119, no. 6, Mar. 2024, pp. 451-457. https://link.springer.com/10.1134/S0021364023603706.