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

doi:10.1103/PhysRevB.78.104513

Appearance of Universal Metallic Dispersion in a Doped Mott Insulator

Strongly Correlated Electrons 2010-02-25 v1

Authors: 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.

Keywords

doped Mott insulator universal metallic dispersion dispersion renormalization LSCO strong correlation LDA-like dispersion preformed metallic states

Cite

@article{arxiv.0809.2357,
  title  = {Appearance of Universal Metallic Dispersion in a Doped Mott Insulator},
  author = {S. Sahrakorpi and R. S. Markiewicz and Hsin Lin and M. Lindroos and X. J. Zhou and T. Yoshida and W. L. Yang and T. Kakeshita and H. Eisaki and S. Uchida and Seiki Komiya and Yoichi Ando and F. Zhou and Z. X. Zhao and T. Sasagawa and A. Fujimori and Z. Hussain and Z. -X. Shen and A. Bansil},
  journal= {arXiv preprint arXiv:0809.2357},
  year   = {2010}
}

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7 pages, 4 figures. PRB 2008 in press

Appearance of Universal Metallic Dispersion in a Doped Mott Insulator

Abstract

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