Can I read Apical Oxygen and Frustration Effects in CuO~2~ Lattice on EtoBox?

Apical Oxygen and Frustration Effects in CuO~2~ Lattice by Kh. Eid; M. Matlak; J. Zieliński is a Physics and Astronomy article available to read on EtoBox.

What is Apical Oxygen and Frustration Effects in CuO~2~ Lattice about?

## Abstract A microscopic model for the CuO~2~ lattice which takes into account two orbitals of copper (3d, 3d and three orbitals of oxygen (2p~__x, y, z__~) is considered. Applying the canonical transformation to eliminate the d–p hybridizations, the effective spin‐dependent Hamiltonian is derived describing superexchange interaction (SX) and Ruderman‐Kittel‐Kasuya‐Yosida (RKKY)‐type interaction. The possible role of apical oxygen degrees of freedom (β (2p~__z__~ − 2p~__x(y)__~ hopping integral), Δ (2p~__z__~ − 3d hybridization), and ε (apical oxygen energy)) for antiferromagnetic frustration effects in the CuO~2~ plane due to SX is investigated. The presence of an apical orbital coupled to the in‐plane copper and oxygen orbitals can effectively enhance these effects. Therefore, both these interactions (SX and RKKY) can cooperate in destroying the antiferromagnetic order in the sublattice of copper spins upon doping. It is shown that the increase of the frustration due to doping favours the formation of the superconducting state. The RKKY interaction is of ferromagnetic character. For small hole concentrations SX and RKKY integrals are of the same order of magnitude but different

Who reads Apical Oxygen and Frustration Effects in CuO~2~ Lattice?

Author

Kh. Eid; M. Matlak; J. Zieliński

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 0370-1972)

Published

1995

Language

EN

Field

Physics and Astronomy (Physical Sciences)