Modulation of the Dirac Point Band Gap in the Antiferromagnetic Topological Insulator MnBi2Te4 due to the Surface Potential Gradient Change
A. M. SHIKIN
1
,
D A Estyunin
1
,
N L Zaitsev
2
,
D. A. Glazkova
1
,
I I Klimovskikh
1
,
S O Filnov
1
,
A G Rybkin
1
,
K. A. Kokh
1, 3
,
O E Tereshchenko
1, 4, 5
,
K. A. ZVEZDIN
6, 7
,
A. K. ZVEZDIN
6, 7
2
Тип публикации: Journal Article
Дата публикации: 2022-01-01
scimago Q3
wos Q3
БС2
SJR: 0.240
CiteScore: 2.2
Impact factor: 0.8
ISSN: 10637761, 10906509
General Physics and Astronomy
Краткое описание
The possibility of significant modulation of the band gap open at the Dirac point (DP) in the range from 15 to 55 meV for different samples of the antiferromagnetic topological insulator MnBi2Te4 is shown using angle-resolved photoemission spectroscopy. The density functional theory is used to analyze the relation between the gap at the DP and the surface potential gradient, the change of which is modeled by the application of an electric field normal to the (0001) MnBi2Te4 surface. The possibility of both decreasing and increasing the DP gap in the range from 5 to 89 meV with respect to the initial value of 81 meV due to the application of a field is shown. When a field is applied, the localization of topological surface states and the magnetic moments of surface atoms change. Our analysis demonstrates the possibility of an artificial band gap modulation at the DP over a wide energy range, which can be used to modulate the magnetoelectric properties of MnBi2Te4-based systems in applied research and problems.
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SHIKIN A. M. et al. Modulation of the Dirac Point Band Gap in the Antiferromagnetic Topological Insulator MnBi2Te4 due to the Surface Potential Gradient Change // Journal of Experimental and Theoretical Physics. 2022. Vol. 134. No. 1. pp. 103-111.
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SHIKIN A. M., Estyunin D. A., Zaitsev N. L., Glazkova D. A., Klimovskikh I. I., Filnov S. O., Rybkin A. G., Kokh K. A., Tereshchenko O. E., ZVEZDIN K. A., ZVEZDIN A. K. Modulation of the Dirac Point Band Gap in the Antiferromagnetic Topological Insulator MnBi2Te4 due to the Surface Potential Gradient Change // Journal of Experimental and Theoretical Physics. 2022. Vol. 134. No. 1. pp. 103-111.
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TY - JOUR
DO - 10.1134/S1063776121120141
UR - https://link.springer.com/10.1134/S1063776121120141
TI - Modulation of the Dirac Point Band Gap in the Antiferromagnetic Topological Insulator MnBi2Te4 due to the Surface Potential Gradient Change
T2 - Journal of Experimental and Theoretical Physics
AU - SHIKIN, A. M.
AU - Estyunin, D A
AU - Zaitsev, N L
AU - Glazkova, D. A.
AU - Klimovskikh, I I
AU - Filnov, S O
AU - Rybkin, A G
AU - Kokh, K. A.
AU - Tereshchenko, O E
AU - ZVEZDIN, K. A.
AU - ZVEZDIN, A. K.
PY - 2022
DA - 2022/01/01
PB - Pleiades Publishing
SP - 103-111
IS - 1
VL - 134
SN - 1063-7761
SN - 1090-6509
ER -
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@article{2022_SHIKIN,
author = {A. M. SHIKIN and D A Estyunin and N L Zaitsev and D. A. Glazkova and I I Klimovskikh and S O Filnov and A G Rybkin and K. A. Kokh and O E Tereshchenko and K. A. ZVEZDIN and A. K. ZVEZDIN},
title = {Modulation of the Dirac Point Band Gap in the Antiferromagnetic Topological Insulator MnBi2Te4 due to the Surface Potential Gradient Change},
journal = {Journal of Experimental and Theoretical Physics},
year = {2022},
volume = {134},
publisher = {Pleiades Publishing},
month = {jan},
url = {https://link.springer.com/10.1134/S1063776121120141},
number = {1},
pages = {103--111},
doi = {10.1134/S1063776121120141}
}
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SHIKIN, A. M., et al. “Modulation of the Dirac Point Band Gap in the Antiferromagnetic Topological Insulator MnBi2Te4 due to the Surface Potential Gradient Change.” Journal of Experimental and Theoretical Physics, vol. 134, no. 1, Jan. 2022, pp. 103-111. https://link.springer.com/10.1134/S1063776121120141.