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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])
ISSN1530-6984
EISSN1530-6992
卷号23期号:7页码:2958–2963
发表状态已发表
DOI10.1021/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
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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
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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
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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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