Fabrication and superconductivity of NaxTaS2 crystals
文献类型：期刊论文
| 作者 | Fang, L ; Wang, Y ; Zou, PY ; Tang, L ; Xu, Z ; Chen, H ; Dong, C ; Shan, L ; Wen, HH |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2005 |
| 卷号 | 72期号:1 |
| 关键词 | CHARGE-DENSITY-WAVE TRANSITION-METAL DICHALCOGENIDES INTERCALATION COMPLEXES ELECTRONIC-STRUCTURE TANTALUM DISULFIDE CS INTERCALATION 2H-TAS2 TEMPERATURE PHOTOEMISSION SULFIDES |
| ISSN号 | 1098-0121 |
| 通讯作者 | Fang, L: Chinese Acad Sci, Inst Phys, Natl Lab Superconducting, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | In this paper we report the growth and superconductivity of NaxTaS2 crystals. The structural data deduced from x-ray diffraction pattern shows that the sample has the same structure as 2H-TaS2. A series of crystals with different superconducting transition temperatures (T-c) ranging from 2.5 K to 4.4 K were obtained. It is found that the T-c rises with the increase of Na content determined by energy-dispersive x-ray microanalysis(EDX) of scanning electron microscope (SEM) on these crystals. Compared with the resistivity curve of un-intercalated sample 2H-TaS2 (T-c=0.8 K, T(CDW)approximate to 70 K), no signal of charge density wave (CDW) was observed in samples Na0.1TaS2 and Na0.05TaS2. However, in some samples with lower T-c, the CDW appears again at about 65 K. Comparison between the anisotropic resistivity indicates that the anisotropy becomes smaller in samples with more Na intercalation (albeit a weak semiconducting behavior along c-axis) and thus higher T-c. It is thus concluded that there is a competition between the superconductivity and the CDW. With the increase of sodium content, the rise of T-c in NaxTaS2 is caused mainly by the suppression to the CDW in 2H-TaS2, and the conventional rigid band model for layered dichalcogenide may be inadequate to explain the changes induced by the slight intercalation of sodium in 2H-TaS2. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/37907]  |
| 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 | Fang, L,Wang, Y,Zou, PY,et al. Fabrication and superconductivity of NaxTaS2 crystals[J]. PHYSICAL REVIEW B,2005,72(1). |
| APA | Fang, L.,Wang, Y.,Zou, PY.,Tang, L.,Xu, Z.,...&Wen, HH.(2005).Fabrication and superconductivity of NaxTaS2 crystals.PHYSICAL REVIEW B,72(1). |
| MLA | Fang, L,et al."Fabrication and superconductivity of NaxTaS2 crystals".PHYSICAL REVIEW B 72.1(2005). |
入库方式： OAI收割
来源：物理研究所
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