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CMP
Credit: Jack Hobhouse

Dingsong Wu

Postdoctoral Research Assistant

Sub department

  • Condensed Matter Physics
dingsong.wu@physics.ox.ac.uk
Clarendon Laboratory
  • About
  • Publications

High-temperature surface state in Kondo insulator U3Bi4Ni3

Science Advances American Association for the Advancement of Science (AAAS) 11:12 (2025) eadq9952

Authors:

Christopher Broyles, Xiaohan Wan, Wenting Cheng, Dingsong Wu, Hengxin Tan, Qiaozhi Xu, Shannon L Gould, Hasan Siddiquee, Leyan Xiao, Ryan Chen, Wanyue Lin, Yuchen Wu, Prakash Regmi, Yun Suk Eo, Jieyi Liu, Yulin Chen, Binghai Yan, Kai Sun, Sheng Ran
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ARPES investigation of the electronic structure and its evolution in magnetic topological insulator MnBi2+2nTe4+3n family

Nature Physics Springer Nature 20:4 (2024) 571-578

Authors:

Dingsong Wu, Jiangang Yang, Jieyi Liu, Houke Chen, Yiheng Yang, Cheng Peng, Yulin Chen, Junjie Jia

Abstract:

The origin of high-temperature superconductivity in iron-based superconductors is still not understood; determination of the pairing symmetry is essential for understanding the superconductivity mechanism. In the iron-based superconductors that have hole pockets around the Brillouin zone centre and electron pockets around the zone corners, the pairing symmetry is generally considered to be s±, which indicates a sign change in the superconducting gap between the hole and electron pockets. For the iron-based superconductors with only hole pockets, however, a couple of pairing scenarios have been proposed, but the exact symmetry is still controversial. Here we determine that the pairing symmetry in KFe2As2—which is a prototypical iron-based superconductor with hole pockets both around the zone centre and around the zone corners—is also of the s± type. Our laser-based angle-resolved photoemission measurements have determined the superconducting gap distribution and identified the locations of the gap nodes on all the Fermi surfaces around the zone centres and the zone corners. These results unify the pairing symmetry in hole-doped iron-based superconductors and point to spin fluctuation as the pairing glue in generating superconductivity.
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Nodal s± pairing symmetry in an iron-based superconductor with only hole pockets

Nature Physics Springer Nature 20:4 (2024) 571-578

Authors:

Dingsong Wu, Junjie Jia, Jiangang Yang, Wenshan Hong, Yingjie Shu, Taimin Miao, Hongtao Yan, Hongtao Rong, Ping Ai, Xing Zhang, Chaohui Yin, Jieyi Liu, Houke Chen, Yiheng Yang, Cheng Peng, Chenlong Li, Shenjin Zhang, Fengfeng Zhang, Feng Yang, Zhimin Wang, Nan Zong, Lijuan Liu, Rukang Li, Xiaoyang Wang, Qinjun Peng, Hanqing Mao, Guodong Liu, Shiliang Li, Yulin Chen, Huiqian Luo, Xianxin Wu, Zuyan Xu, Lin Zhao, Xj Zhou

Abstract:

The origin of high-temperature superconductivity in iron-based superconductors is still not understood; determination of the pairing symmetry is essential for understanding the superconductivity mechanism. In the iron-based superconductors that have hole pockets around the Brillouin zone centre and electron pockets around the zone corners, the pairing symmetry is generally considered to be s±, which indicates a sign change in the superconducting gap between the hole and electron pockets. For the iron-based superconductors with only hole pockets, however, a couple of pairing scenarios have been proposed, but the exact symmetry is still controversial. Here we determine that the pairing symmetry in KFe2As2—which is a prototypical iron-based superconductor with hole pockets both around the zone centre and around the zone corners—is also of the s± type. Our laser-based angle-resolved photoemission measurements have determined the superconducting gap distribution and identified the locations of the gap nodes on all the Fermi surfaces around the zone centres and the zone corners. These results unify the pairing symmetry in hole-doped iron-based superconductors and point to spin fluctuation as the pairing glue in generating superconductivity.
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Electronic nature of charge density wave and electron-phonon coupling in kagome superconductor KV3Sb5

Nature Communications Springer Nature 13:1 (2022) 273

Authors:

Hailan Luo, Qiang Gao, Hongxiong Liu, Yuhao Gu, Dingsong Wu, Changjiang Yi, Junjie Jia, Shilong Wu, Xiangyu Luo, Yu Xu, Lin Zhao, Qingyan Wang, Hanqing Mao, Guodong Liu, Zhihai Zhu, Youguo Shi, Kun Jiang, Jiangping Hu, Zuyan Xu, XJ Zhou
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Genuine electronic structure and superconducting gap structure in (Ba0.6K0.4)Fe2As2 superconductor

Science Bulletin Elsevier 66:18 (2021) 1839-1848

Authors:

Yongqing Cai, Jianwei Huang, Taimin Miao, Dingsong Wu, Qiang Gao, Cong Li, Yu Xu, Junjie Jia, Qingyan Wang, Yuan Huang, Guodong Liu, Fengfeng Zhang, Shenjin Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Zuyan Xu, Lin Zhao, Xingjiang Zhou
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