{"title":"Weak Localization and Weak Anti-Localization in Ultra Thin Sb2Te3 Nanoplates","authors":"A. A. Kuzanyan, S. R. Harutyunyan","doi":"10.3103/S1068337221040101","DOIUrl":null,"url":null,"abstract":"<div><div><h3>\n <b>Abstract</b>\n </h3><p>The electrical conductivity of Sb<sub>2</sub>Te<sub>3</sub> 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<sub>2</sub>Te<sub>3</sub> 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.</p></div></div>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"56 4","pages":"359 - 365"},"PeriodicalIF":0.5000,"publicationDate":"2021-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Contemporary Physics (Armenian Academy of Sciences)","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.3103/S1068337221040101","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The electrical conductivity of Sb2Te3 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 Sb2Te3 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.
期刊介绍：
Journal of Contemporary Physics (Armenian Academy of Sciences) is a journal that covers all fields of modern physics. It publishes significant contributions in such areas of theoretical and applied science as interaction of elementary particles at superhigh energies, elementary particle physics, charged particle interactions with matter, physics of semiconductors and semiconductor devices, physics of condensed matter, radiophysics and radioelectronics, optics and quantum electronics, quantum size effects, nanophysics, sensorics, and superconductivity.
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