Correlations among superconductivity, structural instability, and band filling in Nb1-xB2 at the critical point x approximate to 0.2
文献类型：期刊论文
| 作者 | Xiao, RJ ; Li, KQ ; Yang, HX ; Che, GC ; Zhang, HR ; Ma, C ; Zhao, ZX ; Li, JQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2006 |
| 卷号 | 73期号:22 |
| 关键词 | ENERGY-LOSS SPECTROSCOPY ELECTRONIC-STRUCTURE MGB2 DIBORIDES CONDUCTIVITY STATES LEVEL BORON EDGE |
| ISSN号 | 1098-0121 |
| 通讯作者 | Xiao, RJ: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | We performed an extensive investigation on the correlations among superconductivity, structural instability, and band filling in Nb1-xB2 materials. Structural measurements reveal that a notable phase transformation occurs at x approximate to 0.2, corresponding to the Fermi level (E-F) in the pseudogap with the minimum total density of states (DOS) as demonstrated by the first-principles calculations. Superconductivity in Nb1-xB2 generally becomes visible in the Nb-deficient materials with x >= 0.2. Electron energy-loss spectroscopy (EELS) measurements on B K edge directly demonstrated the presence of a chemical shift arising from the structural transformation. Our systematical experimental results in combination with theoretical analysis suggest that the emergence of hole states in the sigma bands plays an important role for understanding the superconductivity and structural transition in Nb1-xB2. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/35239]  |
| 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 | Xiao, RJ,Li, KQ,Yang, HX,et al. Correlations among superconductivity, structural instability, and band filling in Nb1-xB2 at the critical point x approximate to 0.2[J]. PHYSICAL REVIEW B,2006,73(22). |
| APA | Xiao, RJ.,Li, KQ.,Yang, HX.,Che, GC.,Zhang, HR.,...&Li, JQ.(2006).Correlations among superconductivity, structural instability, and band filling in Nb1-xB2 at the critical point x approximate to 0.2.PHYSICAL REVIEW B,73(22). |
| MLA | Xiao, RJ,et al."Correlations among superconductivity, structural instability, and band filling in Nb1-xB2 at the critical point x approximate to 0.2".PHYSICAL REVIEW B 73.22(2006). |
入库方式： OAI收割
来源：物理研究所
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