Abstract
We study the electronic structure near impurities in the d-density-wave (DDW) state, a possible candidate phase for the pseudo-gap region of the high-temperature superconductors. We show that the density of states near a nonmagnetic impurity in the DDW state is qualitatively different from that in a superconductor with dx 2-y2 symmetry. Thus the electronic structure near impuritiescan provide insight into the nature of the two phases recently observed by scanning tunneling microscopy experiments in the superconducting state of underdoped Bi-2212 compounds.
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Morr, D.K. A Hidden Order in the Cuprate Superconductors: The d-Density-Wave Phase. Journal of Superconductivity 16, 487–490 (2003). https://doi.org/10.1023/A:1023808701835
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DOI: https://doi.org/10.1023/A:1023808701835