Adding magnetism to Bi2Te3/Bi2 multilayers

Marieke Altena; Thies Jansen; Daan Harm Wielens; Martina Tsvetanova; Alexander Brinkman

Adding magnetism to Bi2Te3/Bi2 multilayers

Marieke Altena, Thies Jansen (Contributor), Daan Harm Wielens (Contributor), Martina Tsvetanova (Contributor), Alexander Brinkman (Contributor)

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Abstract

Bi2Te3 is a 3D topological insulator with a single Dirac cone on the surface [1]. This surface state can be gapped by means of magnetic doping, resulting in the quantum anomalous hall state [2]. Recently, there has been an increasing interest in natural superlattices containing Bi2Te3, such as Bi4Te3 [3]. This compound consists of alternating Bi2 and Bi2Te3 layers. The exact topological nature of these compounds is still under debate. Here we fabricated the Bi4Te3 thin films with molecular beam epitaxy and characterized the films with X-ray diffraction, transmission electron microscopy and electrical transport measurements. We show that these films exhibit weak antilocalization, hinting towards the presence of a 2D surface state. Furthermore, we magnetically doped the films with V and observed signatures of magnetism in electrical transport measurements.

[1] Y. L. Chen, et al., Science, 325, 5937. (2009).
[2] C.-Z. Chang, et al, Science, 340, 6129. (2013)
[3] D. Nabok, et al, Phys. Rev. Mat. 6, 034204. (2022)

Original language	English
Publication status	Published - 5 Apr 2023
Event	NWO Physics 2023 - NH Koningshof, Veldhoven, Netherlands Duration: 4 Apr 2023 → 5 Apr 2023 https://www.nwophysics.nl/

Conference

Conference	NWO Physics 2023
Country/Territory	Netherlands
City	Veldhoven
Period	4/04/23 → 5/04/23
Internet address	https://www.nwophysics.nl/

Cite this

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title = "Adding magnetism to Bi2Te3/Bi2 multilayers",

abstract = "Bi2Te3 is a 3D topological insulator with a single Dirac cone on the surface [1]. This surface state can be gapped by means of magnetic doping, resulting in the quantum anomalous hall state [2]. Recently, there has been an increasing interest in natural superlattices containing Bi2Te3, such as Bi4Te3 [3]. This compound consists of alternating Bi2 and Bi2Te3 layers. The exact topological nature of these compounds is still under debate. Here we fabricated the Bi4Te3 thin films with molecular beam epitaxy and characterized the films with X-ray diffraction, transmission electron microscopy and electrical transport measurements. We show that these films exhibit weak antilocalization, hinting towards the presence of a 2D surface state. Furthermore, we magnetically doped the films with V and observed signatures of magnetism in electrical transport measurements. [1] Y. L. Chen, et al., Science, 325, 5937. (2009). [2] C.-Z. Chang, et al, Science, 340, 6129. (2013)[3] D. Nabok, et al, Phys. Rev. Mat. 6, 034204. (2022)",

author = "Marieke Altena and Thies Jansen and Wielens, {Daan Harm} and Martina Tsvetanova and Alexander Brinkman",

year = "2023",

month = apr,

day = "5",

language = "English",

note = "NWO Physics 2023 ; Conference date: 04-04-2023 Through 05-04-2023",

url = "https://www.nwophysics.nl/",

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TY - CONF

T1 - Adding magnetism to Bi2Te3/Bi2 multilayers

AU - Altena, Marieke

A2 - Jansen, Thies

A2 - Wielens, Daan Harm

A2 - Tsvetanova, Martina

A2 - Brinkman, Alexander

PY - 2023/4/5

Y1 - 2023/4/5

N2 - Bi2Te3 is a 3D topological insulator with a single Dirac cone on the surface [1]. This surface state can be gapped by means of magnetic doping, resulting in the quantum anomalous hall state [2]. Recently, there has been an increasing interest in natural superlattices containing Bi2Te3, such as Bi4Te3 [3]. This compound consists of alternating Bi2 and Bi2Te3 layers. The exact topological nature of these compounds is still under debate. Here we fabricated the Bi4Te3 thin films with molecular beam epitaxy and characterized the films with X-ray diffraction, transmission electron microscopy and electrical transport measurements. We show that these films exhibit weak antilocalization, hinting towards the presence of a 2D surface state. Furthermore, we magnetically doped the films with V and observed signatures of magnetism in electrical transport measurements. [1] Y. L. Chen, et al., Science, 325, 5937. (2009). [2] C.-Z. Chang, et al, Science, 340, 6129. (2013)[3] D. Nabok, et al, Phys. Rev. Mat. 6, 034204. (2022)

AB - Bi2Te3 is a 3D topological insulator with a single Dirac cone on the surface [1]. This surface state can be gapped by means of magnetic doping, resulting in the quantum anomalous hall state [2]. Recently, there has been an increasing interest in natural superlattices containing Bi2Te3, such as Bi4Te3 [3]. This compound consists of alternating Bi2 and Bi2Te3 layers. The exact topological nature of these compounds is still under debate. Here we fabricated the Bi4Te3 thin films with molecular beam epitaxy and characterized the films with X-ray diffraction, transmission electron microscopy and electrical transport measurements. We show that these films exhibit weak antilocalization, hinting towards the presence of a 2D surface state. Furthermore, we magnetically doped the films with V and observed signatures of magnetism in electrical transport measurements. [1] Y. L. Chen, et al., Science, 325, 5937. (2009). [2] C.-Z. Chang, et al, Science, 340, 6129. (2013)[3] D. Nabok, et al, Phys. Rev. Mat. 6, 034204. (2022)

M3 - Poster

T2 - NWO Physics 2023

Y2 - 4 April 2023 through 5 April 2023

ER -

Adding magnetism to Bi2Te3/Bi2 multilayers

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Conference

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