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ShanghaiTech University Knowledge Management System
Real-Space Observation of Unidirectional Charge Density Wave and Complex Structural Modulation in the Pnictide Superconductor Ba1-xSrxNi2As2 | |
2023-04-03 | |
发表期刊 | NANO LETTERS (IF:9.6[JCR-2023],10.1[5-Year]) |
ISSN | 1530-6984 |
EISSN | 1530-6992 |
卷号 | 23期号:7页码:2958–2963 |
发表状态 | 已发表 |
DOI | 10.1021/acs.nanolett.3c00323 |
摘要 | Here we use low-temperature and variable-temperature scanning tunneling microscopy to study the pnictide superconductor, Ba1-xSrxNi2As2. In the low-temperature phase (triclinic phase) of BaNi2As2, we observe the unidirectional charge density wave (CDW) with Q = 1/3 on both the Ba and NiAs surfaces. On the NiAs surface of the triclinic BaNi2As2, there are structural-modulation-induced chain-like superstructures with distinct periodicities. In the high-temperature phase (tetragonal phase) of BaNi2As2, the NiAs surface appears as the periodic 1 × 2 superstructure. Interestingly, in the triclinic phase of Ba0.5Sr0.5Ni2As2, the unidirectional CDW is suppressed on both the Ba/Sr and NiAs surfaces, and the Sr substitution stabilizes the periodic 1 × 2 superstructure on the NiAs surface, which enhance the superconductivity in Ba0.5Sr0.5Ni2As2. Our results provide important microscopic insights for the interplay among the unidirectional CDW, structural modulation, and superconductivity in this class of pnictide superconductors. © 2023 American Chemical Society. |
关键词 | Barium compounds Charge density Charge density waves Nickel compounds Scanning tunneling microscopy Strontium compounds Superconducting materials Charge-density-waves Lows-temperatures Pnictide superconductor Pnictides Real-space observations Scanning tunneling microscopy/spectroscopy Structural modulations Triclinic phase Unidirectional charge density wave Variable temperature |
URL | 查看原文 |
收录类别 | SCI ; SCIE ; EI |
语种 | 英语 |
资助项目 | National Key R&D Program of China[2018YFA0704300] ; National Natural Science Foundation of China[ |
WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
WOS类目 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
WOS记录号 | WOS:000967214200001 |
出版者 | American Chemical Society |
EI入藏号 | 20231513872908 |
EI主题词 | Temperature |
EI分类号 | 641.1 Thermodynamics ; 701.1 Electricity: Basic Concepts and Phenomena ; 708.3 Superconducting Materials |
原始文献类型 | Article in Press |
引用统计 | 正在获取...
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文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/292232 |
专题 | 物质科学与技术学院 物质科学与技术学院_PI研究组_颜世超组 物质科学与技术学院_PI研究组_齐彦鹏组 物质科学与技术学院_硕士生 物质科学与技术学院_博士生 |
共同第一作者 | Zhong, Ruixia; Cao, Weizheng |
通讯作者 | Wen, Chenhaoping; Qi, Yanpeng; Yan, Shichao |
作者单位 | 1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 2.ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China 3.ShanghaiTech Univ, Shanghai Key Lab High Resolut Electron Microscopy, Shanghai 201210, Peoples R China |
第一作者单位 | 物质科学与技术学院 |
通讯作者单位 | 物质科学与技术学院; 上海科技大学 |
第一作者的第一单位 | 物质科学与技术学院 |
推荐引用方式 GB/T 7714 | Qin, Tian,Zhong, Ruixia,Cao, Weizheng,et al. Real-Space Observation of Unidirectional Charge Density Wave and Complex Structural Modulation in the Pnictide Superconductor Ba1-xSrxNi2As2[J]. NANO LETTERS,2023,23(7):2958–2963. |
APA | Qin, Tian.,Zhong, Ruixia.,Cao, Weizheng.,Shen, Shiwei.,Wen, Chenhaoping.,...&Yan, Shichao.(2023).Real-Space Observation of Unidirectional Charge Density Wave and Complex Structural Modulation in the Pnictide Superconductor Ba1-xSrxNi2As2.NANO LETTERS,23(7),2958–2963. |
MLA | Qin, Tian,et al."Real-Space Observation of Unidirectional Charge Density Wave and Complex Structural Modulation in the Pnictide Superconductor Ba1-xSrxNi2As2".NANO LETTERS 23.7(2023):2958–2963. |
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