The ground state of the pseudogap in cuprate superconductors.

@article{Valla2006TheGS,
  title={The ground state of the pseudogap in cuprate superconductors.},
  author={T Valla and Alexey V Fedorov and Jinho Lee and John Christopher Davis and G D Gu},
  journal={Science},
  year={2006},
  volume={314 5807},
  pages={
          1914-6
        }
}
We present studies of the electronic structure of La(2-x)BaxCuO4, a system where the superconductivity is strongly suppressed as static spin and charge orders or "stripes" develop near the doping level of x = (1/8). Using angle-resolved photoemission and scanning tunneling microscopy, we detect an energy gap at the Fermi surface with magnitude consistent with d-wave symmetry and with linear density of states, vanishing only at four nodal points, even when superconductivity disappears at x = (1… CONTINUE READING

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