91 citations · 199 across the 17 of their papers we have counts for
17 papers
Diagonal superexchange in a simple square CuO lattice
V. A. Gavrichkov, S. I. Polukeev, S. G. Ovchinnikov
Many microscopic models with the interaction between the next-nearest neighbours as a key parameter for cuprate physics have inspired us to study the diagonal superexchange interac…
Doped Mott-Hubbard materials with a low quasiparticle transparency
Vladimir A. Gavrichkov
Based on the Wilson's criterion metal-insulator, extended to materials with strong electronic correlations, we have identified a specific class of the materials, which is not assoc…
Lattice source for charge and spin inhomogeneity in 2D perovskite cuprates
Vladimir A. Gavrichkov, Semyon I. Polukeev
In the work we highlight the structural features of 2D perovskite cuprates (tilted CuO octahedra with different orientation with respect to spacer rocksalt layers), where sourc…
Magnetic Interaction in Doped 2D Perovskite Cuprates with Nanoscale Inhomogeneity: Lattice Nonlocal Effects vs Superexchange
V. A. Gavrichkov, S. I. Polukeev
We have studied the superexchange interaction in doped cuprates. The AFM interaction strongly depends on the state of the lattice of a CuO layer surrounded by two…
Cation spin and superexchange interaction in oxide materials below and above spin crossover under high pressure
Vladimir A. Gavrichkov, Semyon I. Polukeev, Sergey G. Ovchinnikov
We derived simple rules for the sign of superexchange interaction based on the multielectron calculations of the superexchange interaction in the transition metal oxides that are v…
Is there any hidden symmetry in the stripe structure of perovskite high temperature superconductors?
Vladimir A. Gavrichkov, Yury Shanko, Natalia G. Zamkova +1
Local and fast structural probes using synchrotron radiation have shown nanoscale striped puddles and nanoscale phase separation in doped perovskites.It is known that the striped p…