Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide Sr1-xNdxCuO2

Fan, Jia-Qi1; Yu, Xue-Qing1; Cheng, Fang-Jun1; Wang, Heng1; Wang, Ruifeng1; Ma, Xiaobing1; Hu, Xiao-Peng1; Zhang, Ding1,2,3,4; Ma, Xu-Cun1,2; Xue, Qi-Kun1,2,3,5; Song, Can-Li1,2

2022-05-02

10.1093/nsr/nwab225

National Science Review   影响因子和分区

2095-5138

2053-714X

["The microscopic understanding of high-temperature superconductivity in cuprates has been hindered by the apparent complexity of crystal structures in these materials. We used scanning tunneling microscopy and spectroscopy to study the electron-doped copper oxide compound Sr1-xNdxCuO2, which has only bare cations separating the CuO2 planes and thus the simplest infinite-layer structure of all cuprate superconductors. Tunneling conductance spectra of the major CuO2 planes in the superconducting state revealed direct evidence for a nodeless pairing gap, regardless of variation of its magnitude with the local doping of trivalent neodymium. Furthermore, three distinct bosonic modes are observed as multiple peak-dip-hump features outside the superconducting gaps and their respective energies depend little on the spatially varying gaps. As well as the bosonic modes, with energies identical to those of the external, bending and stretching phonons of copper oxides, our findings reveal the origin of the bosonic modes in lattice vibrations rather than spin excitations.","Tunneling conductance spectra of the essential CuO2 planes in the structurally simplest infinite-layer cuprate superconductors Sr1-xNdxCuO2 revealed direct evidences for nodeless superconductivity and three lattice vibrational modes."]

nodeless superconductivity phonon modes cuprate superconductors CuO2 plane

SCI ; EI

英语

通讯

National Natural Science Foundation of China[51788104,11634007,11774192,11790311] ; Ministry of Science and Technology of China["2018YFA0305603","2017YFA0304600","2017YFA0302902"]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000790936400001

OXFORD UNIV PRESS

20223112455201

Bosons ; Copper oxides ; Electron-phonon interactions ; High temperature superconductors ; Lattice vibrations ; Semiconductor doping ; Strontium compounds

High Temperature Superconducting Materials:708.3.1 ; Semiconducting Materials:712.1 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; Solid State Physics:933 ; Crystal Lattice:933.1.1

Web of Science

1.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
2.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
3.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China
4.RIKEN Ctr Emergent Matter Sci CEMS, Wako, Saitama 3510198, Japan
5.Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China

Fan, Jia-Qi,Yu, Xue-Qing,Cheng, Fang-Jun,et al. Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide Sr1-xNdxCuO2[J]. National Science Review,2022,9(4).

Fan, Jia-Qi.,Yu, Xue-Qing.,Cheng, Fang-Jun.,Wang, Heng.,Wang, Ruifeng.,...&Song, Can-Li.(2022).Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide Sr1-xNdxCuO2.National Science Review,9(4).

Fan, Jia-Qi,et al."Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide Sr1-xNdxCuO2".National Science Review 9.4(2022).