Adding magnetism to Bi2Te3/Bi2 multilayers

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

Research output: Contribution to conferencePosterAcademic

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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 languageEnglish
Publication statusPublished - 5 Apr 2023
EventNWO Physics 2023 - NH Koningshof, Veldhoven, Netherlands
Duration: 4 Apr 20235 Apr 2023


ConferenceNWO Physics 2023
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