[Host: P. Fendley]
We discuss the metallic states which are ordered and therefore are not
convetional Fermi liquids. In odd-frequency density waves the order
parameter vanishes at zero frequency and there is a conventional Fermi
surface. However, the frequency dependence of the gap leads to an
unusual temperature dependence for various thermodynamic and transport
properties. The d-density wave (DDW) is a candidate for the explanation
of the pseudogap phase in superconducting cuprates. The gap vanishes at
the nodal points, which causes the pure DDW state to be metallic.
However, DDW can coexist with either antiferromagnetic or
superconducting phases. We consider a microscopic model which favors DDW
and do the mean-field-theoretical derivation of the phase diagram (this
work is in progress).
Condensed Matter Seminar
Wednesday, January 30, 2002
Physics Building, Room 204
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