Impedance spectroscopy study of mixed Bi2Se3 topological insulator-magnetic insulator nanoparticles

Dong Min Choi; Kyu Won Lee; Yeo Jin Lee; Cheol Eui Lee

doi:10.1016/j.physe.2020.114293

Impedance spectroscopy study of mixed Bi₂Se₃ topological insulator-magnetic insulator nanoparticles

Dong Min Choi, Kyu Won Lee, Yeo Jin Lee, Cheol Eui Lee

Department of Physics

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

1 Citation (Scopus)

Abstract

Our impedance spectroscopy measurements have revealed an increase in the surface state resistance of the topological insulator Bi₂Se₃ nanoparticles mixed with magnetic insulator BaFe₁₂O₁₉ nanoparticles. The unusual change in the transport properties of the topological insulator may be explained by an opening of the energy band gap, arising from exchange coupling to the proximate magnetic insulator nanoparticles.

Original language	English
Article number	114293
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	124
DOIs	https://doi.org/10.1016/j.physe.2020.114293
Publication status	Published - 2020 Oct

Keywords

Impedance spectroscopy
Magnetic insulator nanoparticles
Magnetic proximity effect
Topological insulator BiSe nanoparticles

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

Access to Document

10.1016/j.physe.2020.114293

Cite this

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title = "Impedance spectroscopy study of mixed Bi2Se3 topological insulator-magnetic insulator nanoparticles",

abstract = "Our impedance spectroscopy measurements have revealed an increase in the surface state resistance of the topological insulator Bi2Se3 nanoparticles mixed with magnetic insulator BaFe12O19 nanoparticles. The unusual change in the transport properties of the topological insulator may be explained by an opening of the energy band gap, arising from exchange coupling to the proximate magnetic insulator nanoparticles.",

keywords = "Impedance spectroscopy, Magnetic insulator nanoparticles, Magnetic proximity effect, Topological insulator BiSe nanoparticles",

author = "Choi, {Dong Min} and Lee, {Kyu Won} and Lee, {Yeo Jin} and Lee, {Cheol Eui}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (Project No. 2019R1A2C1002076). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements. Funding Information: This work was supported by the National Research Foundation of Korea (Project No. 2019R1A2C1002076 ). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

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doi = "10.1016/j.physe.2020.114293",

language = "English",

volume = "124",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

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AU - Choi, Dong Min

AU - Lee, Kyu Won

AU - Lee, Yeo Jin

AU - Lee, Cheol Eui

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (Project No. 2019R1A2C1002076). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements. Funding Information: This work was supported by the National Research Foundation of Korea (Project No. 2019R1A2C1002076 ). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements. Publisher Copyright: © 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/10

Y1 - 2020/10

N2 - Our impedance spectroscopy measurements have revealed an increase in the surface state resistance of the topological insulator Bi2Se3 nanoparticles mixed with magnetic insulator BaFe12O19 nanoparticles. The unusual change in the transport properties of the topological insulator may be explained by an opening of the energy band gap, arising from exchange coupling to the proximate magnetic insulator nanoparticles.

AB - Our impedance spectroscopy measurements have revealed an increase in the surface state resistance of the topological insulator Bi2Se3 nanoparticles mixed with magnetic insulator BaFe12O19 nanoparticles. The unusual change in the transport properties of the topological insulator may be explained by an opening of the energy band gap, arising from exchange coupling to the proximate magnetic insulator nanoparticles.

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KW - Magnetic insulator nanoparticles

KW - Magnetic proximity effect

KW - Topological insulator BiSe nanoparticles

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