Andreev reflection spectroscopy evidence for multiple gaps in MgB2
文献类型：期刊论文
| 作者 | Li, ZZ ; Tao, HJ ; Xuan, Y ; Ren, ZA ; Che, GC ; Zhao, BR |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2002 |
| 卷号 | 66期号:6 |
| 关键词 | SUPERCONDUCTING ENERGY-GAP TUNNELING SPECTROSCOPY POINT-CONTACT BORON |
| ISSN号 | 1098-0121 |
| 通讯作者 | Tao, HJ: Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | Andreev reflection tunneling spectroscopy on MgB2/PtIr point contacts have systematically been investigated. By fitting tunneling conductance to Blonder-Tinkham-Klapwijk theory, s-wave superconducting gaps were obtained. The distribution of the obtained gaps unequivocally shows two groups: one centered at 9.8 meV and the other peaked at 2.8 meV with a gap ratio of 3.5. For two typical gaps Delta(1)=1.92 meV and Delta(2)=3.45 meV their temperature-dependent behavior display that Delta(1)(T) unambiguously persists to the bulk T-c, 39 K, and Delta(2)(T) closes at 33 K. The results support multigap scenarios; in addition our experiments yield a much higher value of the large gap than the previous reports and theoretical predictions, indicating there may exist even stronger electron-phonon coupling in MgB2. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/33739]  |
| 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 | Li, ZZ,Tao, HJ,Xuan, Y,et al. Andreev reflection spectroscopy evidence for multiple gaps in MgB2[J]. PHYSICAL REVIEW B,2002,66(6). |
| APA | Li, ZZ,Tao, HJ,Xuan, Y,Ren, ZA,Che, GC,&Zhao, BR.(2002).Andreev reflection spectroscopy evidence for multiple gaps in MgB2.PHYSICAL REVIEW B,66(6). |
| MLA | Li, ZZ,et al."Andreev reflection spectroscopy evidence for multiple gaps in MgB2".PHYSICAL REVIEW B 66.6(2002). |
入库方式： OAI收割
来源：物理研究所
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