https://scholars.lib.ntu.edu.tw/handle/123456789/626455
標題: | Disorder-induced 2D superconductivity in a NbTiN film grown on Si by ultrahigh-vacuum magneton sputtering | 作者: | Sheng-Zong Chen Jing-Wei Yang Tzu-Yu Peng Yu-Cheng Chu Ching-Chen Yeh I-Fan Hu Swapnil Mhatre Yu-Jung Lu CHI-TE LIANG |
關鍵字: | BKT transition | NbTiN | Sputter | Superconductivity | two-dimensional superconductivity | 公開日期: | 2022 | 出版社: | {IOP} Publishing | 卷: | 35 | 期: | 6 | 來源出版物: | Superconductor Science and Technology | 摘要: | We report on the growth and characterization of a niobium titanium nitride (NbTiN) film on a Si substrate prepared by ultrahigh vacuum sputtering. We show that the superconducting transition temperature is lower than those of high-quality NbTiN films. Interestingly, even though the zero-temperature Ginzburg-Landau coherence length (=9.77 nm) is significantly shorter than the film thickness (=86 nm), we are still able to observe the Berezinskii-Kosterlitz-Thouless-like transition, indicating the two-dimensional (2D) signature of our three-dimensional (3D) sample. We propose that the mechanism of hidden 2D superconducting property is similar to the recently reported results of the disordered induced 3D to 2D superconductor transition. We suggest further theoretical work is required for studying our new experimental results. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/626455 | ISSN: | 09532048 | DOI: | 10.1088/1361-6668/ac6631 |
顯示於: | 物理學系 |
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