Weak Localization and Weak Anti-Localization in Ultra Thin Sb2Te3 Nanoplates

The electrical conductivity of Sb 2 Te 3 topological insulator nanoplates of different thickness, grown by vapor-phase deposition, has been studied. The characteristic properties of conductivity are revealed depending on the transverse magnetic field (0–9 T) and temperature (3–300 K). In a magnetic...

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Bibliographic Details
Published in:Journal of contemporary physics 2021-10, Vol.56 (4), p.359-365
Main Authors: Kuzanyan, A. A., Harutyunyan, S. R.
Format: Article
Language:English
Subjects:
Electrical resistivity
Localization
Magnetic fields
Magnetic properties
Particle and Nuclear Physics
Physics
Physics and Astronomy
Thickness
Topological insulators
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Summary:The electrical conductivity of Sb 2 Te 3 topological insulator nanoplates of different thickness, grown by vapor-phase deposition, has been studied. The characteristic properties of conductivity are revealed depending on the transverse magnetic field (0–9 T) and temperature (3–300 K). In a magnetic field, ultrathin 11 nm thick Sb 2 Te 3 nanoplates demonstrate a giant anomaly of weak antilocalization, accompanied by the effect of weak localization. A continuous decrease in electrical resistance with decreasing temperature and its sharp drop at the temperature of ∼4 K is a sign of the superconducting transition. Ultrathin samples exhibit a magnetic-field tunable superconductor-insulator transition.
ISSN:1068-3372
1934-9378
DOI:10.3103/S1068337221040101