dc.contributor.author | KONOPKO, Leonid | |
dc.contributor.author | NIKOLAEVA, Albina | |
dc.contributor.author | HUBER, Tito | |
dc.date.accessioned | 2023-11-06T10:44:03Z | |
dc.date.available | 2023-11-06T10:44:03Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | KONOPKO, Leonid, NIKOLAEVA, Albina, HUBER, Tito. Quantum Oscillations in Topological Insulator Bi2Te2Se Microwires Contacted with Superconducting In2Bi Leads. In: 6th International Conference on Nanotechnologies and Biomedical Engineering: proc. of ICNBME-2023, 20–23, 2023, Chisinau, vol. 1: Nanotechnologies and Nano-biomaterials for Applications in Medicine, 2023, p. 293-302. ISBN 978-3-031-42774-9. e-ISBN 978-3-031-42775-6. | en_US |
dc.identifier.isbn | 978-3-031-42774-9 | |
dc.identifier.isbn | 978-3-031-42775-6 | |
dc.identifier.uri | https://doi.org/10.1007/978-3-031-42775-6_33 | |
dc.identifier.uri | http://repository.utm.md/handle/5014/24643 | |
dc.description | Acces full text - https://doi.org/10.1007/978-3-031-42775-6_33 | en_US |
dc.description.abstract | We studied the magnetoresistance (MR) of polycrystal Bi2Te2Se topological insulator (TI) microwires contacted with superconducting In2Bi leads. Bi2Te2Se has a simple band structure with a single Dirac cone on the surface and a large non-trivial bulk gap of 300 meV. To study the TI/SC interface, the Bi2Te2Se glass-coated microwire with a diameter of d = 17 µm was connected to copper leads on one side using superconducting alloy In2Bi (Tc = 5.6 K), and on the other side using gallium. The topologically nontrivial 3D superconductor (SC) In2Bi has proximity-induced superconductivity of topological surface states. To eliminate conventional contribution to superconductivity from the bulk, the resulting edge states of the TI/SC contact area were studied in magnetic fields above Hc2 in In2Bi. The h/2e oscillations of magnetoresistance (MR) in longitudinal and transverse magnetic fields (up to 1 T) at the TI/SC interface were observed at various temperatures (4.2 k–1.5 K). 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 effective width of the closed superconducting area of the TI/SC interface is determined to be 15 nm from an analysis of FFT spectra and the beats of the MR oscillations for two different directions of magnetic field. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Springer Nature Switzerland | 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 | topological insulators | en_US |
dc.subject | superconductivity | en_US |
dc.subject | thin microwires | en_US |
dc.subject | proximity effect | en_US |
dc.subject | magnetoresistance | en_US |
dc.subject | oscillations of magnetoresistance | en_US |
dc.title | Quantum Oscillations in Topological Insulator Bi2Te2Se Microwires Contacted with Superconducting In2Bi Leads | en_US |
dc.type | Article | en_US |
The following license files are associated with this item: