Physics – Condensed Matter – Superconductivity
Scientific paper
1999-11-08
Physics
Condensed Matter
Superconductivity
24 pages, 26 PS figures
Scientific paper
10.1103/PhysRevB.62.1252
A phase separation model is presented for the stripe phase of the cuprates, which allows the doping dependence of the photoemission spectra to be calculated. The idealized limit of a well-ordered array of magnetic and charged stripes is analyzed, including effects of long-range Coulomb repulsion. Remarkably, down to the limit of two-cell wide stripes, the dispersion can be interpreted as essentially a superposition of the two end-phase dispersions, with superposed minigaps associated with the lattice periodicity. The largest minigap falls near the Fermi level; it can be enhanced by proximity to a (bulk) Van Hove singularity. The calculated spectra are dominated by two features -- this charge stripe minigap plus the magnetic stripe Hubbard gap. There is a strong correlation between these two features and the experimental photoemission results of a two-peak dispersion in La$_{2-x}$Sr$_x$CuO$_4$, and the peak-dip-hump spectra in Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$. The differences are suggestive of the role of increasing stripe fluctuations. The 1/8 anomaly is associated with a quantum critical point, here expressed as a percolation-like crossover. A model is proposed for the limiting minority magnetic phase as an isolated two-leg ladder.
No associations
LandOfFree
Dispersion of Ordered Stripe Phases in the Cuprates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dispersion of Ordered Stripe Phases in the Cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispersion of Ordered Stripe Phases in the Cuprates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-61372