Superconductivity of Individual Pb Islands on Si(111): Pseudogap, Critical Region, Density of States, and Island Size
文献类型：期刊论文
| 作者 | Jiepeng Liu; Xuefeng Wu; Fangfei Ming; Kedong Wang; Xudong Xiao |
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2013 |
| 英文摘要 | With high energy resolution scanning tunneling spectroscopy, we have studied the superconductivity of a set of individual Pb islands grown on a Si(111) surface. By systematically examining 8 and 9 ML thick Pb islands with a large range of lateral sizes, we have found that their superconducting transition temperatures follow the same trend of gradual suppression on decreasing the size of the island, despite having a different density of states (DOS) at the Fermi level. This behavior is completely different from the sudden drop of transition temperature observed in the ensemble Pb particles system. Our systematic analysis in treating the temperature-dependent pseudogap state for the Pb islands has revealed a critical region in superconductivity that originates from fluctuations and was predicted by theory. Our further analysis has indicated that when the size decreases, the DOS change at EF due to the discretization of electronic levels wins over the phonon softening for Pb islands and results in a net decrease of the superconductivity temperature. |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/0953-2048/26/8/085009/ |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/4373]  |
| 专题 | 深圳先进技术研究院_集成所 |
| 作者单位 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY |
| 推荐引用方式 GB/T 7714 | Jiepeng Liu,Xuefeng Wu,Fangfei Ming,et al. Superconductivity of Individual Pb Islands on Si(111): Pseudogap, Critical Region, Density of States, and Island Size[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2013. |
| APA | Jiepeng Liu,Xuefeng Wu,Fangfei Ming,Kedong Wang,&Xudong Xiao.(2013).Superconductivity of Individual Pb Islands on Si(111): Pseudogap, Critical Region, Density of States, and Island Size.SUPERCONDUCTOR SCIENCE & TECHNOLOGY. |
| MLA | Jiepeng Liu,et al."Superconductivity of Individual Pb Islands on Si(111): Pseudogap, Critical Region, Density of States, and Island Size".SUPERCONDUCTOR SCIENCE & TECHNOLOGY (2013). |
入库方式： OAI收割
来源：深圳先进技术研究院
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