Dispersion of Ordered Stripe Phases in the Cuprates

Abstract

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.

24 pages, 26 PS figures

References in corpus (8)

• Electronic Spectra and Their Relation to the (pi,pi) Collective Mode in High-Tc Superconductors
• Quasiparticles in the superconducting state of Bi2Sr2CaCu2O8
• Direct Observation of a One Dimensional Static Spin Modulation in Insulating La1.95Sr0.05CuO4
• Spin gap and magnetic coherence in a clean high-T_c superconductor
• Charge Segregation, Cluster Spin-Glass and Superconductivity in La1.94Sr0.06CuO4
• The Fermi surface of Bi2Sr2CaCu2O8
• Origin of the Charge-Orbital Stripe Structure in La_(1-x)Ca_(x)MnO_(3) (x=1/2, 2/3)
• Remnant Fermi Surfaces in Photoemission

Cited by in corpus (13)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Enhancement of long-range magnetic order by magnetic field in superconducting La2CuO(4+y)
• Intermediate Coupling Model of the Cuprates
• Evolution of the stripe phase as a function of doping from a theoretical analysis of angle-resolved photoemission data
• Superconductivity in electron-doped cuprates: Gap shape change and symmetry crossover with doping
• Modeling a striped pseudogap state
• Phase Separation Models for Cuprate Stripe Arrays
• Nanoscale phase separation in deep underdoped Bi${}_2$Sr${}_2$CuO${}_{6+\delta }$ and Ca${}_2$CuO${}_2$Cl${}_2$
• High-order Van Hove singularities in cuprates and related high-Tc superconductors
• Flux Phase as a Dynamic Jahn-Teller Phase: Berryonic Matter in the Cuprates?
• Spectral and optical properties in the antiphase stripe phase of the cuprate superconductors
• White-Scalapino-like Stripes in a Mean-Field Hubbard Model
• A first-principles-based study of the thermodynamics of competing low-energy states in correlated materials: Example of cuprates