Angle-resolved photoemission intensity map of LiCu₂O₂ at a constant energy of −1.75 eV.

From the article:

Electronic Phase Separation and Dramatic Inverse Band Renormalization in the Mixed-Valence Cuprate ${\mathrm{LiCu}}_2{\mathrm{O}}_2$
S. Moser, Y. Nomura, L. Moreschini, G. Gatti, H. Berger, P. Bugnon, A. Magrez, C. Jozwiak, A. Bostwick, E. Rotenberg, S. Biermann, and M. Grioni
Phys. Rev. Lett. 118, 176404 (2017)

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