Quantum skyrmions and the destruction of long-range antiferromagnetic order in the high-Tc superconductors La2−xSrxCuO4 and YBa2Cu3O6+x
Eduardo C. Marino, Marcello B. Silva Neto
DOI 10.1103/PhysRevB.64.092511 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We study the destruction of long-range antiferromagnetic order in the high-Tc superconductors La2−xSrxCuO4 and YBa2Cu3O6+x. The CP1-nonlinear sigma model formulation of the two-dimensional quantum Heisenberg antiferromagnet is used for describing the pure system. Dopants are introduced as independent fermions with an appropriate dispersion relation determined by the shape of the Fermi surface. Skyrmion topological defects are shown to be introduced by doping and their energy is used as an order parameter for the antiferromagnetic order. We obtain analytic expressions for the skyrmion energy as a function of doping that allow us to plot, without adjustable parameters, the curves TN(xc)×xc and M(x)×x, for the two compounds, in good quantitative agreement with the experimental data.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Total Suppression of Superconductivity by High Magnetic Fields in YBa2Cu3O6.6
similarity 0.95F. Rullier-Albenque et al.
Source status unknown — claims are unverified
Long-range Coulomb interactions and the onset of superconductivity in the high-Tc materials
similarity 0.95S. Doniach & M. Inui
Source status unknown — claims are unverified
Interplay of quantum magnetic and potential scattering around Zn and Ni impurity ions in superconducting cuprates
similarity 0.95Guang-Ming Zhang et al.
Source status unknown — claims are unverified
Effects of Bi(x) additives on microstructure and superconductivity in YBa2−xBixCu3O7−δ
similarity 0.95Shanker Ram & K. A. Narayan
Source status unknown — claims are unverified
Disorder and chain superconductivity in YBa2Cu3O7−δ
similarity 0.95W. A. Atkinson
Source status unknown — claims are unverified
Fragile superconductivity in the presence of weakly disordered charge density waves
similarity 0.95Yue Yu & S. A. Kivelson
Source status unknown — claims are unverified