Nodal metallic behavior of lightly-doped La$_{2-x}$Sr$_x$CuO$_4$

T. Yoshida; X. J. Zhou; T. Sasagawa; W. L. Yang; P. V. Bogdanov; A. Lanzara; Z. Hussain; T. Mizokawa; A. Fujimori; H. Eisaki; Z. -X. Shen; T. Kakeshita; S. Uchida

doi:10.1103/PhysRevLett.91.027001

Nodal metallic behavior of lightly-doped La$_{2-x}$Sr$_x$CuO$_4$

Strongly Correlated Electrons 2009-11-07 v2 Superconductivity

Authors: T. Yoshida , X. J. Zhou , T. Sasagawa , W. L. Yang , P. V. Bogdanov , A. Lanzara , Z. Hussain , T. Mizokawa , A. Fujimori , H. Eisaki , Z. -X. Shen , T. Kakeshita , S. Uchida

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Abstract

Lightly-doped La $_{2-x}$ Sr $_x$ CuO $_4$ in the so-called "insulating" spin-glass/diagonal-stripe phase has been studied by angle-resolved photoemission spectroscopy. A quasi-particle (QP) peak crossing the Fermi level has been observed in the node direction of the d-wave superconducting gap, forming an "arc" of Fermi surface consistent with the recently observed metallic transport behavior at high temperatures of lightly-doped materials. The spectral weight of the nodal QP smoothly increases with hole doping, corresponding to the $n \sim x$ behavior of the carrier number in the underdoped and lightly-doped regions.

Keywords

nodal metallic behavior La_{2-x}Sr_xCuO_4 angle-resolved photoemission Fermi arc d-wave superconductivity

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@article{arxiv.cond-mat/0206469,
  title  = {Nodal metallic behavior of lightly-doped La$_{2-x}$Sr$_x$CuO$_4$},
  author = {T. Yoshida and X. J. Zhou and T. Sasagawa and W. L. Yang and P. V. Bogdanov and A. Lanzara and Z. Hussain and T. Mizokawa and A. Fujimori and H. Eisaki and Z. -X. Shen and T. Kakeshita and S. Uchida},
  journal= {arXiv preprint arXiv:cond-mat/0206469},
  year   = {2009}
}

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5 pages, 4 figures

Nodal metallic behavior of lightly-doped La$_{2-x}$Sr$_x$CuO$_4$

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