Meissner and mesoscopic superconducting states in 1-4 unit-cell FeSe films
文献类型：期刊论文
| 作者 | Deng, LZ ; Lv, B ; Wu, Z ; Xue, YY ; Zhang, WH ; Li, FS ; Wang, LL ; Ma, XC ; Xue, QK ; Chu, CW |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2014 |
| 卷号 | 90期号:21 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Deng, LZ (reprint author), Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA. |
| 中文摘要 | We report a detailed investigation on the superconductivity in eight 1-4 unit-cell (UC) FeSe films on SrTiO3 substrates by measuring their magnetization and sheet resistance in a field between 5 x 10(-2) and 7 x 10(4) Oe over the last one and a half years as a function of temperature and frequency, from 2 to 300 K and from 0 to 1.5 kHz, respectively. The results show that samples of 1-4-UC FeSe films all display a complex superconducting structure, i.e., a Meissner state but populated with weak links below 20 K, and an unusual superconducting mesostructure up to 45 K, strongly suggesting that superconductivity may be of an interfacial nature. A model is proposed to account for the magnetizations in such a superconducting mesoscopic structure, similar to the Andreev reflection between the normal and superconducting carriers. Above 45 K, collective glasslike excitations are evident, although their nature is yet to be determined. The complex superconducting structure observed is consistent with the challenges in synthesizing ultrathin FeSe films with a superconducting temperature much higher than that of a bulk FeSe. |
| 资助信息 | US Air Force Office of Scientific Research [FA9550-09-1-0656]; T. L. L. Temple Foundation; John J. and Rebecca Moores Endowment; State of Texas through the Texas Center for Superconductivity at the University of Houston |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59489]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Deng, LZ,Lv, B,Wu, Z,et al. Meissner and mesoscopic superconducting states in 1-4 unit-cell FeSe films[J]. PHYSICAL REVIEW B,2014,90(21). |
| APA | Deng, LZ.,Lv, B.,Wu, Z.,Xue, YY.,Zhang, WH.,...&Chu, CW.(2014).Meissner and mesoscopic superconducting states in 1-4 unit-cell FeSe films.PHYSICAL REVIEW B,90(21). |
| MLA | Deng, LZ,et al."Meissner and mesoscopic superconducting states in 1-4 unit-cell FeSe films".PHYSICAL REVIEW B 90.21(2014). |
入库方式： OAI收割
来源：物理研究所
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