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 SM ISO690:2012KONOPKO, Leonid, NIKOLAEVA, Albina, HUBER, Tito. Quantum Oscillations in Topological Insulator Bi2Te2Se Microwires Contacted with Superconducting In2Bi Leads. In: IFMBE Proceedings: . 6th International Conference on Nanotechnologies and Biomedical Engineering , Ed. 6, 20-23 septembrie 2023, Chişinău. Chişinău: Springer Science and Business Media Deutschland GmbH, 2024, Ediția 6, Vol.91, pp. 293-302. ISBN 978-303142774-9. ISSN 16800737. DOI: https://doi.org/10.1007/978-3-031-42775-6_33 |
| EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
 IFMBE Proceedings Ediția 6, Vol.91, 2024 |
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Conferința "6th International Conference on Nanotechnologies and Biomedical Engineering" 6, Chişinău, Moldova, 20-23 septembrie 2023 | ||||||
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| DOI:https://doi.org/10.1007/978-3-031-42775-6_33 | ||||||
| Pag. 293-302 | ||||||
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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. |
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| Cuvinte-cheie h/2e oscillations of magnetoresistance, Magnetoresistance, Proximity effect, superconductivity, Thin microwire, topological insulator |
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Dublin Core Export
<?xml version='1.0' encoding='utf-8'?> <oai_dc:dc xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:oai_dc='http://www.openarchives.org/OAI/2.0/oai_dc/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd'> <dc:creator>Konopko, L.A.</dc:creator> <dc:creator>Nikolaeva, A.A.</dc:creator> <dc:creator>Huber, T.E.</dc:creator> <dc:date>2024</dc:date> <dc:description xml:lang='en'><p>We studied the magnetoresistance (MR) of polycrystal Bi<sub>2</sub>Te<sub>2</sub>Se topological insulator (TI) microwires contacted with superconducting In<sub>2</sub>Bi leads. Bi<sub>2</sub>Te<sub>2</sub>Se 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 Bi<sub>2</sub>Te<sub>2</sub>Se glass-coated microwire with a diameter of d = 17 µm was connected to copper leads on one side using superconducting alloy In<sub>2</sub>Bi (T<sub>c</sub> = 5.6 K), and on the other side using gallium. The topologically nontrivial 3D superconductor (SC) In<sub>2</sub>Bi 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 H<sub>c2</sub> in In<sub>2</sub>Bi. 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.</p></dc:description> <dc:source>IFMBE Proceedings (Ediția 6, Vol.91) 293-302</dc:source> <dc:subject>h/2e oscillations of magnetoresistance</dc:subject> <dc:subject>Magnetoresistance</dc:subject> <dc:subject>Proximity effect</dc:subject> <dc:subject>superconductivity</dc:subject> <dc:subject>Thin microwire</dc:subject> <dc:subject>topological insulator</dc:subject> <dc:title>Quantum Oscillations in Topological Insulator Bi2Te2Se Microwires Contacted with Superconducting In2Bi Leads</dc:title> <dc:type>info:eu-repo/semantics/article</dc:type> </oai_dc:dc>
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