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Rapid Communication|1 Article(s)
Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor
Cong Li, Guangyang Dai, Yongqing Cai, Yang Wang, Xiancheng Wang, Qiang Gao, Guodong Liu, Yuan Huang, Qingyan Wang, Fengfeng Zhang, Shenjin Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Zuyan Xu, Changqing Jin, Lin Zhao, and X J Zhou
Super-high resolution laser-based angle-resolved photoemission measurements are carried out on LiFeAs superconductor to investigate its electron dynamics. Three energy scales at ～ 20 meV, ～ 34 meV, and ～ 55 meV are revealed for the first time in the electron self-energy both in the superconducting state and normal state. The ～ 20 meV and ～ 34 meV scales can be attributed to the coupling of electrons with sharp bosonic modes which are most likely phonons. These observations provide definitive evidence on the existence of mode coupling in iron-based superconductors. Super-high resolution laser-based angle-resolved photoemission measurements are carried out on LiFeAs superconductor to investigate its electron dynamics. Three energy scales at ～ 20 meV, ～ 34 meV, and ～ 55 meV are revealed for the first time in the electron self-energy both in the superconducting state and normal state. The ～ 20 meV and ～ 34 meV scales can be attributed to the coupling of electrons with sharp bosonic modes which are most likely phonons. These observations provide definitive evidence on the existence of mode coupling in iron-based superconductors.
Chinese Physics B
- Publication Date: Jan. 01, 2020
- Vol. 29, Issue 10, (2020)
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