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Superconductivity in Single-Quintuple-Layer Bi2Te3 Grown on Epitaxial FeTe.
Nano Letters ( IF 9.6 ) Pub Date : 2020-03-31 , DOI: 10.1021/acs.nanolett.9b05167 Hailang Qin 1 , Bin Guo 1 , Linjing Wang 1 , Meng Zhang 1 , Bochao Xu 1 , Kaige Shi 1 , Tianluo Pan 1 , Liang Zhou 1 , Junshu Chen 1 , Yang Qiu 2 , Bin Xi 3 , Iam Keong Sou 4 , Dapeng Yu 1 , Wei-Qiang Chen 1 , Hongtao He 1 , Fei Ye 1 , Jia-Wei Mei 1 , Gan Wang 1
Nano Letters ( IF 9.6 ) Pub Date : 2020-03-31 , DOI: 10.1021/acs.nanolett.9b05167 Hailang Qin 1 , Bin Guo 1 , Linjing Wang 1 , Meng Zhang 1 , Bochao Xu 1 , Kaige Shi 1 , Tianluo Pan 1 , Liang Zhou 1 , Junshu Chen 1 , Yang Qiu 2 , Bin Xi 3 , Iam Keong Sou 4 , Dapeng Yu 1 , Wei-Qiang Chen 1 , Hongtao He 1 , Fei Ye 1 , Jia-Wei Mei 1 , Gan Wang 1
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How an interfacial superconductivity emerges during the nucleation and epitaxy is of great importance not only for unveiling the physical insights but also for finding a feasible way to tune the superconductivity via interfacial engineering. In this work, we report the nanoscale creation of a robust and relatively homogeneous interfacial superconductivity (TC ≈ 13 K) on the epitaxial FeTe surface, by van der Waals epitaxy of single-quintuple-layer topological insulator Bi2Te3. Our study suggests that the superconductivity in the Bi2Te3/FeTe heterostructure is generated at the interface and that the superconductivity at the interface does not enhance or weaken with the increase of the Bi2Te3 thickness beyond 1 quintuple layer (QL). The observation of the topological surface states crossing Fermi energy in the Bi2Te3/FeTe heterostructure with the average Bi2Te3 thickness of about 20 QL provides further evidence that this heterostructure may potentially host Majorana zero modes.
中文翻译：
外延FeTe上生长的单四层Bi2Te3的超导性。
在成核和外延过程中如何产生界面超导电性，不仅对于揭示物理见解，而且对于寻找通过界面工程调节超导性的可行方法都具有重要意义。在这项工作中，我们报告了通过单层五层拓扑绝缘体Bi2Te3的范德华外延在外延FeTe表面上形成健壮且相对均匀的界面超导电性（TC≈13 K）的纳米尺度。我们的研究表明，Bi2Te3 / FeTe异质结构中的超导性在界面处产生，并且当Bi2Te3厚度超过1倍五层（QL）时，界面处的超导性不会增强或减弱。
更新日期：2020-03-24
中文翻译：
外延FeTe上生长的单四层Bi2Te3的超导性。
在成核和外延过程中如何产生界面超导电性，不仅对于揭示物理见解，而且对于寻找通过界面工程调节超导性的可行方法都具有重要意义。在这项工作中，我们报告了通过单层五层拓扑绝缘体Bi2Te3的范德华外延在外延FeTe表面上形成健壮且相对均匀的界面超导电性（TC≈13 K）的纳米尺度。我们的研究表明，Bi2Te3 / FeTe异质结构中的超导性在界面处产生，并且当Bi2Te3厚度超过1倍五层（QL）时，界面处的超导性不会增强或减弱。
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