Mechanism of pseudogap probed by a local impurity

Details Mechanism of pseudogap probed by a local impurity Mechanism of pseudogap probed by a local impurity

2001-06-18

arxiv.org/abs/cond-mat/0106327v4

Phys. Rev. Lett. 88, 057002 (2002)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.88.057002

The response to a local strong non-magnetic impurity in the pseudogap phase is examined in two distinctly different scenarios: phase-fluctuation (PF) of pairing field and d-density-wave (DDW) order. In the PF scenario, the resonance state is generally double-peaked near the Fermi level, and is abruptly broadened by vortex fluctuations slightly above the transition temperature. In the DDW scenario, the resonance is single-peaked and remains sharp up to gradual intrinsic thermal broadening, and the resonance energy is analytically determined to be at minus of the chemical potential.

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