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Quantum oscillations at the topological insulator microwire/topological superconductor interface

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dc.contributor.author KONOPKO, L. A.
dc.contributor.author NIKOLAEVA, A. A.
dc.contributor.author HUBER, T. E.
dc.date.accessioned 2024-11-27T13:09:51Z
dc.date.available 2024-11-27T13:09:51Z
dc.date.issued 2024
dc.identifier.citation KONOPKO, L. A.; A. A. NIKOLAEVA and T.E. HUBER. Quantum oscillations at the topological insulator microwire/topological superconductor interface. In: Materials Science and Condensed-Matter Physics: MSCMP: 10th International Conference dedicated to the 60th anniversary from the foundation of the Institute of Applied Physics, October 1-4, 2024. Book of abstracts. Chişinău: CEP USM, 2024, p. 211. ISBN 978-9975-62-763-4. en_US
dc.identifier.isbn 978-9975-62-763-4
dc.identifier.uri http://repository.utm.md/handle/5014/28658
dc.description Only Abstract. en_US
dc.description.abstract In this work, the magnetoresistance (MR) of topological insulator (TI) single-crystal Bi0.83Sb0.17 and polycrystalline Bi2Te2Se glass-coated microwires in contact with In2Bi superconducting (SC) leads was investigated. To study the TI/SC interface, the glass-coated microwire was connected to copper leads on one side using In2Bi superconducting alloy (Tc=5.6 K) and on the other side using gallium. Gallium has superconductivity at temperatures below 1 K, so it was a normal metal in our measurements. The topologically nontrivial 3D superconductor In2Bi has proximity-induced superconductivity of topological surface states. The h/2e oscillations of magnetoresistance in longitudinal and transverse magnetic fields (up to 1 T) at the TI/SC interface were observed at different temperatures (4.2 K–1.5 K) [1,2] (see Fig. 1). To explain the observed oscillations, we used magnetic flux quantization, which requires a multiply connected geometry where flux can penetrate into normal regions surrounded by a superconductor. The effect r of the closed superconducting area of the TI/SC interface was determined to be 15 nm based on the analysis of FFT spectra and the beats of the MR oscillations for two different directions (longitudinal and transverse) of the magnetic field. en_US
dc.language.iso en en_US
dc.publisher Institute of Applied Physics, Moldova State University en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject magnetoresistance (MR) en_US
dc.subject topological insulator (TI) en_US
dc.subject superconductor en_US
dc.title Quantum oscillations at the topological insulator microwire/topological superconductor interface en_US
dc.type Article en_US


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