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Condensed matter physics. Solid state physics (349) |
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SM ISO690:2012 MUNTYANU, Fiodor M., NENKOV , Konstantin A., ZALESKI, Andrzej Janusz, KONDRYA, Elena, CHISTOL, Vitalie. Various manifestations of weak magnetism and superconductivity in inclination interfaces of Bi, Sb and Bi1-xSbx. In: Moldavian Journal of the Physical Sciences, 2021, nr. 2(20), pp. 129-135. ISSN 1810-648X. DOI: https://doi.org/10.53081/mjps.2021.20-2.03 |
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Moldavian Journal of the Physical Sciences | |
Numărul 2(20) / 2021 / ISSN 1810-648X /ISSNe 2537-6365 | |
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DOI:https://doi.org/10.53081/mjps.2021.20-2.03 | |
CZU: 538.945+537.622+546.86/.87 | |
Pag. 129-135 | |
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Rezumat | |
The magnetic properties of the nano-width bicrystal interfaces (CIs) of Bi, Sb and 3D topological insulator Bi1xSbx (0.06 ≤ x ≤ 0.2) are studied in a temperature range of 1.6–300 K. These materials do not show superconductivity under normal rhombohedral conditions and are anomalous diamagnetics. At the same time, two superconducting phases with Tc ≤ 21 K and magnetic hysteresis loops against a diamagnetic background typical for strong type II superconductors are identified in Bi interfaces. At the CIs of Bi1xSbx (0.06 ≤ x ≤ 0.2), as well as Sb, a superconducting transition and a ferromagnetic hysteresis loop or a dual loop (superimposed ferromagnetic and superconducting loops) against a paramagnetic background are observed; they indicate the simultaneous occurrence of superconductivity and weak ferromagnetism, which is specific to 3D topological insulators. The revealed coexistence of superconductivity and weak magnetism at these CIs is of significant interest for the fundamental physics and future applications in quantum computing and spintronic devices. |
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Cuvinte-cheie Bismuth, Antimony, bismuth–antimony alloys, Bicrystal interface, Superconductivity and ferromagnetism, 3D topological insulator, bismut, stibiu, aliaje bismut-stibiu, interfață bicristalină, superconductivitate și ferromagnetism, izolator topologic 3D |
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