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Ferromagnetic Layers in a Topological Insulator (Bi,Sb)2Te3Crystal Doped with Mn. / Frolov, Alexander S.; Usachov, Dmitry Yu; Fedorov, Alexander V. et al.

In: ACS Nano, Vol. 16, No. 12, 27.12.2022, p. 20831-20841.

Research output: Contribution to journal › Article › peer-review

Harvard

Frolov, AS, Usachov, DY, Fedorov, AV, Vilkov, OY, Golyashov, V, Tereshchenko, OE, Bogomyakov, AS, Kokh, K, Muntwiler, M, Amati, M, Gregoratti, L, Sirotina, AP, Abakumov, AM, Sánchez-Barriga, J & Yashina, LV 2022, 'Ferromagnetic Layers in a Topological Insulator (Bi,Sb)2Te3Crystal Doped with Mn', ACS Nano, vol. 16, no. 12, pp. 20831-20841. https://doi.org/10.1021/acsnano.2c08217

APA

Frolov, A. S., Usachov, D. Y., Fedorov, A. V., Vilkov, O. Y., Golyashov, V., Tereshchenko, O. E., Bogomyakov, A. S., Kokh, K., Muntwiler, M., Amati, M., Gregoratti, L., Sirotina, A. P., Abakumov, A. M., Sánchez-Barriga, J., & Yashina, L. V. (2022). Ferromagnetic Layers in a Topological Insulator (Bi,Sb)2Te3Crystal Doped with Mn. ACS Nano, 16(12), 20831-20841. https://doi.org/10.1021/acsnano.2c08217

Vancouver

Frolov AS, Usachov DY, Fedorov AV, Vilkov OY, Golyashov V, Tereshchenko OE et al. Ferromagnetic Layers in a Topological Insulator (Bi,Sb)2Te3Crystal Doped with Mn. ACS Nano. 2022 Dec 27;16(12):20831-20841. Epub 2022 Nov 15. doi: 10.1021/acsnano.2c08217

Author

Frolov, Alexander S. ; Usachov, Dmitry Yu ; Fedorov, Alexander V. et al. / Ferromagnetic Layers in a Topological Insulator (Bi,Sb)2Te3Crystal Doped with Mn. In: ACS Nano. 2022 ; Vol. 16, No. 12. pp. 20831-20841.

BibTeX

@article{e8b3ce64fdf94b9e82041243b77411e0,
title = "Ferromagnetic Layers in a Topological Insulator (Bi,Sb)2Te3Crystal Doped with Mn",
abstract = "Magnetic topological insulators (MTIs) have recently become a subject of poignant interest; among them, Z2 topological insulators with magnetic moment ordering caused by embedded magnetic atoms attract special attention. In such systems, the case of magnetic anisotropy perpendicular to the surface that holds a topologically nontrivial surface state is the most intriguing one. Such materials demonstrate the quantum anomalous Hall effect, which manifests itself as chiral edge conduction channels that can be manipulated by switching the polarization of magnetic domains. In the present paper, we uncover the atomic structure of the bulk and the surface of Mn0.06Sb1.22Bi0.78Te3.06 in conjunction with its electronic and magnetic properties; this material is characterized by naturally formed ferromagnetic layers inside the insulating matrix, where the Fermi level is tuned to the bulk band gap. We found that in such mixed crystals septuple layers (SLs) of Mn(Bi,Sb)2Te4 form structures that feature three SLs, each of which is separated by two or three (Bi,Sb)2Te3 quintuple layers (QLs); such a structure possesses ferromagnetic properties. The surface obtained by cleavage includes terraces with different terminations. Manganese atoms preferentially occupy the central positions in the SLs and in a very small proportion can appear in the QLs, as indirectly indicated by a reshaped Dirac cone.",
keywords = "ARPES, electron band structure, ferromagnetism, magnetic topological insulators, photoelectron diffraction, surface structure",
author = "Frolov, {Alexander S.} and Usachov, {Dmitry Yu} and Fedorov, {Alexander V.} and Vilkov, {Oleg Yu} and Vladimir Golyashov and Tereshchenko, {Oleg E.} and Bogomyakov, {Artem S.} and Konstantin Kokh and Matthias Muntwiler and Matteo Amati and Luca Gregoratti and Sirotina, {Anna P.} and Abakumov, {Artem M.} and Jaime S{\'a}nchez-Barriga and Yashina, {Lada V.}",
note = "Funding Information: We gratefully acknowledge financial support from the Russian Science Foundation (RSF) under Grant No. 19-42-06303. D. Yu. U. and O.Yu.V acknowledge Saint Petersburg State University (Grant No. 90383050). We thank Helmholtz-Zentrum Berlin for granting access to the beamlines RGBL and ISISS, PSI for granting access to the Pearl beamline, and ELETTRA for granting access to the ESCAmicroscopy beamline. We thank Dr. Anna Makarova for her support during the measurements. V.A.G. and O.E.T. acknowledge the RFBR support (Grant No. 21-52-12024). Publisher Copyright: {\textcopyright} ",
year = "2022",
month = dec,
day = "27",
doi = "10.1021/acsnano.2c08217",
language = "English",
volume = "16",
pages = "20831--20841",
journal = "ACS Nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "12",

}

RIS

TY - JOUR

T1 - Ferromagnetic Layers in a Topological Insulator (Bi,Sb)2Te3Crystal Doped with Mn

AU - Frolov, Alexander S.

AU - Usachov, Dmitry Yu

AU - Fedorov, Alexander V.

AU - Vilkov, Oleg Yu

AU - Golyashov, Vladimir

AU - Tereshchenko, Oleg E.

AU - Bogomyakov, Artem S.

AU - Kokh, Konstantin

AU - Muntwiler, Matthias

AU - Amati, Matteo

AU - Gregoratti, Luca

AU - Sirotina, Anna P.

AU - Abakumov, Artem M.

AU - Sánchez-Barriga, Jaime

AU - Yashina, Lada V.

N1 - Funding Information: We gratefully acknowledge financial support from the Russian Science Foundation (RSF) under Grant No. 19-42-06303. D. Yu. U. and O.Yu.V acknowledge Saint Petersburg State University (Grant No. 90383050). We thank Helmholtz-Zentrum Berlin for granting access to the beamlines RGBL and ISISS, PSI for granting access to the Pearl beamline, and ELETTRA for granting access to the ESCAmicroscopy beamline. We thank Dr. Anna Makarova for her support during the measurements. V.A.G. and O.E.T. acknowledge the RFBR support (Grant No. 21-52-12024). Publisher Copyright: ©

PY - 2022/12/27

Y1 - 2022/12/27

N2 - Magnetic topological insulators (MTIs) have recently become a subject of poignant interest; among them, Z2 topological insulators with magnetic moment ordering caused by embedded magnetic atoms attract special attention. In such systems, the case of magnetic anisotropy perpendicular to the surface that holds a topologically nontrivial surface state is the most intriguing one. Such materials demonstrate the quantum anomalous Hall effect, which manifests itself as chiral edge conduction channels that can be manipulated by switching the polarization of magnetic domains. In the present paper, we uncover the atomic structure of the bulk and the surface of Mn0.06Sb1.22Bi0.78Te3.06 in conjunction with its electronic and magnetic properties; this material is characterized by naturally formed ferromagnetic layers inside the insulating matrix, where the Fermi level is tuned to the bulk band gap. We found that in such mixed crystals septuple layers (SLs) of Mn(Bi,Sb)2Te4 form structures that feature three SLs, each of which is separated by two or three (Bi,Sb)2Te3 quintuple layers (QLs); such a structure possesses ferromagnetic properties. The surface obtained by cleavage includes terraces with different terminations. Manganese atoms preferentially occupy the central positions in the SLs and in a very small proportion can appear in the QLs, as indirectly indicated by a reshaped Dirac cone.

AB - Magnetic topological insulators (MTIs) have recently become a subject of poignant interest; among them, Z2 topological insulators with magnetic moment ordering caused by embedded magnetic atoms attract special attention. In such systems, the case of magnetic anisotropy perpendicular to the surface that holds a topologically nontrivial surface state is the most intriguing one. Such materials demonstrate the quantum anomalous Hall effect, which manifests itself as chiral edge conduction channels that can be manipulated by switching the polarization of magnetic domains. In the present paper, we uncover the atomic structure of the bulk and the surface of Mn0.06Sb1.22Bi0.78Te3.06 in conjunction with its electronic and magnetic properties; this material is characterized by naturally formed ferromagnetic layers inside the insulating matrix, where the Fermi level is tuned to the bulk band gap. We found that in such mixed crystals septuple layers (SLs) of Mn(Bi,Sb)2Te4 form structures that feature three SLs, each of which is separated by two or three (Bi,Sb)2Te3 quintuple layers (QLs); such a structure possesses ferromagnetic properties. The surface obtained by cleavage includes terraces with different terminations. Manganese atoms preferentially occupy the central positions in the SLs and in a very small proportion can appear in the QLs, as indirectly indicated by a reshaped Dirac cone.

KW - ARPES

KW - electron band structure

KW - ferromagnetism

KW - magnetic topological insulators

KW - photoelectron diffraction

KW - surface structure

UR - http://www.scopus.com/inward/record.url?scp=85142329004&partnerID=8YFLogxK

U2 - 10.1021/acsnano.2c08217

DO - 10.1021/acsnano.2c08217

M3 - Article

C2 - 36378602

AN - SCOPUS:85142329004

VL - 16

SP - 20831

EP - 20841

JO - ACS Nano

JF - ACS Nano

SN - 1936-0851

IS - 12

ER -

ID: 39704690