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arXiv · 0711.1706

Identification of a New Form of Electron Coupling in Bi2Sr2CaCu2O8 Superconductor by Laser-Based Angle-Resolved Photoemission

Wentao Zhang·Guodong Liu·Lin Zhao·Haiyun Liu·Jianqiao Meng·Xiaoli Dong·Wei Lu·J. S. Wen·Z. J. Xu·G. D. Gu·T. Sasagawa·Guiling Wang·Yong Zhu·Hongbo Zhang·Yong Zhou·Xiaoyang Wang·Zhongxian Zhao·Chuangtian Chen·Zuyan Xu·X. J. Zhou
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Abstract

Laser-based angle-resolved photoemission measurements with super-high resolution have been carried out on an optimally-doped Bi$_2$Sr$_2$CaCu$_2$O$_8$ high temperature superconductor. New high energy features at $\sim$115 meV and $\sim$150 meV, besides the prominent $\sim$70 meV one, are found to develop in the nodal electron self-energy in the superconducting state. These high energy features, which can not be attributed to electron coupling with single phonon or magnetic resonance mode, point to the existence of a new form of electron coupling in high temperature superconductors.

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Wentao Zhang, Guodong Liu, Lin Zhao, Haiyun Liu, Jianqiao Meng, Xiaoli Dong, Wei Lu, J. S. Wen, Z. J. Xu, G. D. Gu, T. Sasagawa, Guiling Wang, Yong Zhu, Hongbo Zhang, Yong Zhou, Xiaoyang Wang, Zhongxian Zhao, Chuangtian Chen, Zuyan Xu, X. J. Zhou. 2008-03-19. Identification of a New Form of Electron Coupling in Bi2Sr2CaCu2O8 Superconductor by Laser-Based Angle-Resolved Photoemission. https://doi.org/10.1103/physrevlett.100.107002

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