Universal waterfalls-like feature in the spectral function of high temperature superconductors

J. Graf; G. -H. Gweon; A. Lanzara

doi:10.1016/j.physc.2007.03.005

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Universal waterfalls-like feature in the spectral function of high temperature superconductors

J. Graf·G. -H. Gweon·A. Lanzara

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Abstract

By performing high resolution angle resolved photoemission spectroscopy (ARPES) experiments on four different families of p-type cuprates, over an energy range much bigger than investigated before, we report the discovery of a universal high energy anomaly in the spectral function. This anomaly is characterized by the presence of two new high energy scales $E_1= 0.35-0.45$eV and $E_2=0.8-0.9$eV and the pinning of the main ARPES spectral function along the boundary of a diamond in the momentum space. This anomaly unveils a missing link between the doped oxygen holes and the quasiparticles, providing a full range of relevant interaction to the high Tc problem.

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J. Graf, G. -H. Gweon, A. Lanzara. 2006-10-17. Universal waterfalls-like feature in the spectral function of high temperature superconductors. https://doi.org/10.1016/j.physc.2007.03.005

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