Effect of next-nearest-neighbor hopping on the antiferromagnetism and vortex charges in high-temperature superconductors: Numerical solution of the Bogoliubov-de Gennes equations
Guo-Qiao Zha, Hong-Wei Zhao, Shi-Ping Zhou
DOI 10.1103/PhysRevB.76.132503 · 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
The effect of next-nearest-neighbor (nnn) hopping on the antiferromagnetism and vortex charges for doped high-temperature superconductors is investigated by numerically solving the Bogoliubov-de Gennes equations based on a model Hamiltonian with competing antiferromagnetic (AFM) and d-wave superconductivity interactions. We find that the AFM order magnitude in the vortex core is first enhanced and then suppressed for an optimally doped sample, accompanied with vortex charge sign change from positive to negative when the relative nnn hopping strength increases from 0 to 0.4. It is also found that positive vortex charges can be observed at a large nnn hopping strength even though the AFM order remains strong for an underdoped sample. In addition, transitions between isotropic two-dimensional and one-dimensional structures of vortex charge and spin-density wave orders may occur by tuning the nnn hopping strength.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Oxygen hole symmetry and banding in cuprate superconductors
similarity 0.96L. F. Mattheiss & D. R. Hamann
Source status unknown — claims are unverified
Test of first-principle calculations of charge transfer and electron-hole distribution in oxide superconductors by precise measurements of structure factors
similarity 0.96Lijun Wu et al.
Source status unknown — claims are unverified
Dynamics of metastable vortex states in weakly pinned superconductors: A phenomenological model
similarity 0.96G. Ravikumar
Source status unknown — claims are unverified
Anisotropic normal-state transport properties predicted and analyzed for high-Tc oxide superconductors
similarity 0.96Philip B. Allen et al.
Source status unknown — claims are unverified
Fluctuations of vortices in layered high-Tc superconductors
similarity 0.96L. N. Bulaevskii et al.
Source status unknown — claims are unverified
Theory for inelastic neutron scattering in orthorhombic high-Tc superconductors
similarity 0.96Andreas P. Schnyder et al.
Source status unknown — claims are unverified