Antinodal kink in the band dispersion of electron-doped cuprate La2-xCexCuO4 +/-delta

Tang, C. Y.1,2,3; Lin, Z. F.1,2,3; Zhang, J. X.4; Guo, X. C.1,2,3; Zhong, Y. G.1,2,3; Guan, J. Y.1,2,3; Gao, S. Y.1,2,3; Rao, Z. C.1,2,3; Zhao, J.1,2,3; Huang, Y. B.5; Qian, T.1,2,6; Weng, Z. Y.4; Jin, K.1,2,3,6; Sun, Y. J.1,2,7; Ding, H.1,2,3,6

2022-05-03

10.1038/s41535-022-00459-1

NPJ QUANTUM MATERIALS   影响因子和分区

2397-4648

Angle-resolved photoemission spectroscopy (ARPES) measurements have established the phenomenon of kink in band dispersion of high-T-c cuprate superconductors. However, systematic studies of the kink in electron-doped cuprates are still lacking experimentally. We performed in situ ARPES measurements on La2-xCexCuO4 +/-delta (LCCO) thin films over a wide electron doping (n) range from 0.05 to 0.23. While the nodal kink is nearly invisible, an antinodal kink around 45 meV, surviving above 200 K, is observed for n similar to 0.05-0.19, whose position is roughly independent of doping. The fact that the antinodal kink observed at high temperatures and in the highly overdoped region favors the phonon mechanism with contributions from the Cu-O bond-stretching mode and the out-of-plane oxygen buckling mode.

SCI

英语

通讯

Natural Science Foundation of China[11888101,11227903,12141402,"U1875192"] ; Ministry of Science and Technology of China["2016YFA0401000","2017YFA0302902","2017YFA0403401"] ; Chinese Academy of Sciences["XDB07000000","XDB25000000"]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Quantum Science & Technology ; Physics, Applied ; Physics, Condensed Matter

WOS:000790256500001

NATURE PORTFOLIO

2-s2.0-85129245033

Web of Science

1.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China
5.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201204, Peoples R China
6.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
7.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

Tang, C. Y.,Lin, Z. F.,Zhang, J. X.,et al. Antinodal kink in the band dispersion of electron-doped cuprate La2-xCexCuO4 +/-delta[J]. NPJ QUANTUM MATERIALS,2022,7(1).

Tang, C. Y..,Lin, Z. F..,Zhang, J. X..,Guo, X. C..,Zhong, Y. G..,...&Ding, H..(2022).Antinodal kink in the band dispersion of electron-doped cuprate La2-xCexCuO4 +/-delta.NPJ QUANTUM MATERIALS,7(1).

Tang, C. Y.,et al."Antinodal kink in the band dispersion of electron-doped cuprate La2-xCexCuO4 +/-delta".NPJ QUANTUM MATERIALS 7.1(2022).