Physics – Condensed Matter – Superconductivity
Scientific paper
2000-12-23
PRL 87, 257003 (2001)
Physics
Condensed Matter
Superconductivity
5 pages REVTeX + 2 PostScript Figures. Final version to appear in PRL
Scientific paper
10.1103/PhysRevLett.87.257003
Within the phase fluctuation model for the pseudogap state of cuprate superconductors we identify a novel statistical "Berry phase" interaction between the nodal quasiparticles and fluctuating vortices. The effective action describing this model assumes the form of an anisotropic Euclidean quantum electrodynamics in (2+1) dimensions (QED_3) and naturally generates the marginal Fermi liquid behavior for its fermionic excitations. The doping axis in the x-T phase diagram emerges as a quantum critical line which regulates low energy fermiology. We examine the merits of our theory in light of available experiments.
Franz Marcel
Tesanovic Zlatko
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