Physical Review B, volume 106, issue 15, publication number 155305

Contact of the intrinsic magnetic topological insulator Mn(Bi,Sb)2Te4 with a superconducting Pb film

Estyunin Dmitry A. ¹

Makarova Tatiana P. ¹

Kokh K. A. ^{1, 2, 3}

Tereshchenko O E ^{1, 4, 5}

SHIKIN A. M. ¹

Klimovskikh I I ^{1, 6}

Hide authors affiliations Show authors affiliations: 6 affiliations

Saint Petersburg State University, 198504 Saint Petersburg, Russia |

V.S. Sobolev Institute of Geology and Mineralogy, 630090 Novosibirsk, Russia |

Kemerovo State University, Kemerovo, 650000, Russia |

⁴

Novosibirsk State University, 630090 Novosibirsk, Russia |

⁵

Rzhanov Institute of Semiconductor Physics, 630090 Novosibirsk, Russia |

⁶

Moscow Institute of Physics and Technology, Dolgoprudny, Moscow 141700, Russia |

Publication type: Journal Article

Publication date: 2022-10-21

American Physical Society (APS)

Journal: Physical Review B

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Impact factor: 3.7

ISSN: 24699950, 24699969, 10980121, 1550235X

DOI: 10.1103/PhysRevB.106.155305

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Abstract

Intrinsic magnetic topological insulators (MTIs), such as an ${\mathrm{MnBi}}_{2}{\mathrm{Te}}_{4}$ family, have proved to be an essential platform for the study of various quantum effects and can be used for a range of applications from information storage and dissipationless spin and charge transfer to quantum computers. The latter requires the creation of Majorana fermions, which are expected to emerge when a superconductor is contacted with an MTI surface. Therefore the study of the features arising at the interface between the MTI and the superconductor is of great interest. For this purpose in this paper, the gradual growth of the elemental superconductor (Pb) film on the surface of $\mathrm{Mn}{({\mathrm{Bi}}_{0.7}{\mathrm{Sb}}_{0.3})}_{2}{\mathrm{Te}}_{4}$, which has a Dirac point near the Fermi level, was experimentally investigated by ARPES and XPS methods. We observed that the shape of the Dirac cone state remains almost unchanged up to coverage of $\ensuremath{\sim}1.5$ Pb monolayers, thus remaining topological properties of the material. It was shown that Pb atoms deposition results in surface modification. They detached upper Te atoms and form TePb alloy on the surface. Moreover, Pb deposition leads to disorder of Te, Bi(Sb) layers closest to the surface. As a result, the localization of the Dirac cone state shifts towards the bulk. All these features should be taken into account in the implementation of a topological superconducting state based on the Pb/Mn(Bi,${\mathrm{Sb})}_{2}{\mathrm{Te}}_{4}$ systems.

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Estyunin D. A. et al. Contact of the intrinsic magnetic topological insulator Mn(Bi,Sb)2Te4 with a superconducting Pb film // Physical Review B. 2022. Vol. 106. No. 15. 155305

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Estyunin D. A., Makarova T. P., Kokh K. A., Tereshchenko O. E., SHIKIN A. M., Klimovskikh I. I. Contact of the intrinsic magnetic topological insulator Mn(Bi,Sb)2Te4 with a superconducting Pb film // Physical Review B. 2022. Vol. 106. No. 15. 155305

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RIS Copy

TY - JOUR

DO - 10.1103/PhysRevB.106.155305

UR - https://doi.org/10.1103%2FPhysRevB.106.155305

TI - Contact of the intrinsic magnetic topological insulator Mn(Bi,Sb)2Te4 with a superconducting Pb film

T2 - Physical Review B

AU - Estyunin, Dmitry A.

AU - Makarova, Tatiana P.

AU - Kokh, K. A.

AU - Tereshchenko, O E

AU - SHIKIN, A. M.

AU - Klimovskikh, I I

PY - 2022

DA - 2022/10/21 00:00:00

PB - American Physical Society (APS)

IS - 15

VL - 106

SN - 2469-9950

SN - 2469-9969

SN - 1098-0121

SN - 1550-235X

ER -

BibTex

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@article{2022_Estyunin,

author = {Dmitry A. Estyunin and Tatiana P. Makarova and K. A. Kokh and O E Tereshchenko and A. M. SHIKIN and I I Klimovskikh},

title = {Contact of the intrinsic magnetic topological insulator Mn(Bi,Sb)2Te4 with a superconducting Pb film},

journal = {Physical Review B},

year = {2022},

volume = {106},

publisher = {American Physical Society (APS)},

month = {oct},

url = {https://doi.org/10.1103%2FPhysRevB.106.155305},

number = {15},

doi = {10.1103/PhysRevB.106.155305}

}

Found error?

Publisher

American Physical Society (APS)

Journal

Physical Review B

Quartile SCImago

Quartile WOS

Impact factor

3.7

ISSN

24699950 (Print)
24699969 (Electronic)
10980121 (Print)
1550235X (Electronic)

Labs

Laboratory of Photoelectron Spectroscopy of Quantum Functional Materials

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