Evolution of hole and spin dynamics in high-Tc superconductors within the small hole density limit of the t - J model

  title={Evolution of hole and spin dynamics in high-Tc superconductors within the small hole density limit of the t - J model},
  author={Bumsoo Kyung},
  journal={Solid State Communications},
  • B. Kyung
  • Published 2 March 1998
  • Physics
  • Solid State Communications


Pseudogaps and the spin-bag approach to high-Tc superconductivity.
It is shown that antiferromagnetic spin fluctuations in a two-dimensional metal, such as heavily doped cuprate superconductors, lead to a pseudogap in the electronic spectrum, and the self-energy of spin bags and their pairing interaction are calculated.
Spin waves in a doped antiferromagnet.
Spin waves are studied in the t-J model for low dopant concentrations on the basis of a Green's-function formalism in a slave-fermion Schwinger boson representation. The self-consistent Born
Magnetic excitations of a doped two-dimensional antiferromagnet.
Magnetic excitations of the two-dimensional (2D) t-J model are considered in the presence of a small concentration of holes c and Migdal's theorem is shown to be valid for the model considered.
Spectral function and photoemission spectra in antiferromagnetically correlated metals.
In the spectral function weight is shifted from the single quasiparticle peak of the Fermi-liquid regime to the incoherent particle and hole backgrounds, which evolve into the upper and lower Mott-Hubbard bands of the antiferromagnetic insulator.
Dynamical properties of a hole in a Heisenberg antiferromagnet.
The solution for the hole spectral function, obtained by neglecting such small contributions from vertex corrections, shows that most features describing the hole motion are in close agreement with the results of the exact diagonalization on the 4{sup 2} lattice in the region of {ital J}/{ital t}{le}0.
Correlated electrons in high-temperature superconductors
Theoretical ideas and experimental results concerning high-temperature superconductors are reviewed. Special emphasis is given to calculations performed with the help of computers applied to models
Phenomenological model of nuclear relaxation in the normal state of YBa2Cu3O7.
A phenomenological model of a system of antiferromagnetically correlated spins is shown to give a good quantitative description of NMR, nuclear-quadrupole-resonance, and Knight-shift measurements on
Low-temperature behavior of two-dimensional quantum antiferromagnets.
The parameters are consistent with the spin-wave theory for the nearest-neighbor spin-(1/2 Heisenberg antiferromagnet on a square lattice) and the coupling constant must be chosen in the range where an isolated layer has antiferromeagnetic order at T=0.
Spin polarons in the t-J model.
  • Martnez, Horsch
  • Physics, Medicine
    Physical review. B, Condensed matter
  • 1991
En supposant un ordre antiferromagnetique a longue distance, the dynamique du spin est traitee dans the theorie de l'onde de spin lineaire.
Spectral function of a single hole in a two-dimensional quantum antiferromagnet.
Les calculs utilisent l'approximation auto-coherente de Born pour l'auto-energie dans la limite thermodynamique, le residu de quasiparticule, the masse effective and le fond d'onde de spin multiple incoherente sont determines en fonction de l'amplitude de saut.