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arXiv · 0809.2357

Appearance of Universal Metallic Dispersion in a Doped Mott Insulator

S. Sahrakorpi·R. S. Markiewicz·Hsin Lin·M. Lindroos·X. J. Zhou·T. Yoshida·W. L. Yang·T. Kakeshita·H. Eisaki·S. Uchida·Seiki Komiya·Yoichi Ando·F. Zhou·Z. X. Zhao·T. Sasagawa·A. Fujimori·Z. Hussain·Z. -X. Shen·A. Bansil
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Abstract

We have investigated the dispersion renormalization $Z_{disp}$ in La$_{2-x}$Sr$_x$CuO$_4$ (LSCO) over the wide doping range of $x=0.03-0.30$, for binding energies extending to several hundred meV's. Strong correlation effects conspire in such a way that the system exhibits an LDA-like dispersion which essentially `undresses' ($Z_{disp}\to 1$) as the Mott insulator is approached. Our finding that the Mott insulator contains `nascent' or `preformed' metallic states with a vanishing spectral weight offers a challenge to existing theoretical scenarios for cuprates.

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S. Sahrakorpi, R. S. Markiewicz, Hsin Lin, M. Lindroos, X. J. Zhou, T. Yoshida, W. L. Yang, T. Kakeshita, H. Eisaki, S. Uchida, Seiki Komiya, Yoichi Ando, F. Zhou, Z. X. Zhao, T. Sasagawa, A. Fujimori, Z. Hussain, Z. -X. Shen, A. Bansil. 2008-09-13. Appearance of Universal Metallic Dispersion in a Doped Mott Insulator. https://doi.org/10.1103/physrevb.78.104513

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