| Инд. авторы: | Shvetsov O.O., Kostarev V.A., Kononov A., Golyashov V.A., Kokh K.A., Tereshchenko O.E., Deviatov E.V. |
| Заглавие: | Conductance oscillations and zero-bias anomaly in a single superconducting junction to a three-dimensional Bi2Te3 topological insulator |
| Библ. ссылка: | Shvetsov O.O., Kostarev V.A., Kononov A., Golyashov V.A., Kokh K.A., Tereshchenko O.E., Deviatov E.V. Conductance oscillations and zero-bias anomaly in a single superconducting junction to a three-dimensional Bi2Te3 topological insulator // EPL. - 2017. - Vol.119. - Iss. 5. - Art.57009. - ISSN 0295-5075. - EISSN 1286-4854. |
| Внешние системы: | DOI: 10.1209/0295-5075/119/57009; WoS: 000424835800001; |
| Реферат: | eng: We experimentally investigate Andreev transport through a single junction between an s-wave indium superconductor and a thick film of a three-dimensional Bi2Te3 topological insulator. We study Bi2Te3 samples with different bulk and surface characteristics, where the presence of a topological surface state is confirmed by direct ARPES measurements. All the junctions demonstrate Andreev transport within the superconducting gap. For junctions with transparent In-Bi2Te3 interfaces we find a number of nearly periodic conductance oscillations, which are accompanied by zero-bias conductance anomaly. Both effects disappear above the superconducting transition or for resistive junctions. We propose a consistent interpretation of both effects as originating from proximity-induced superconducting correlations within the Bi2Te3 topological surface state.
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| Ключевые слова: | GRAPHENE; CONDUCTIVITY; EDGE; FILMS; SURFACE; MAJORANA FERMIONS; ANDREEV REFLECTION; P-N-JUNCTION; NORMAL-METAL; CONTACT; |
| Издано: | 2017 |
| Физ. характеристика: | 57009 |