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

IF 0.5 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2021-12-19 DOI:10.3103/S1068337221040101

A. A. Kuzanyan, S. R. Harutyunyan

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.

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超薄Sb2Te3纳米片的弱定位和弱反定位

摘要研究了气相沉积法制备不同厚度Sb2Te3拓扑绝缘体纳米片的电导率。研究了横向磁场(0-9 T)和温度(3-300 K)对Sb2Te3纳米板电导率的影响。在磁场中，超薄11 nm厚的Sb2Te3纳米板表现出巨大的弱反局域异常，并伴有弱局域效应。电阻随着温度的降低而持续下降，在~ 4 K时电阻急剧下降是超导转变的标志。超薄样品表现出磁场可调谐的超导体-绝缘体转变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Contemporary Physics (Armenian Academy of Sciences) PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

66.70%

发文量

审稿时长

6-12 weeks

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.