Checkerboard patterns and magnetic resonance peak in cuprate superconductors

摘要

We investigate a kind of spin-Peierls transition (SP) in high T-c superconductivity. It is found the antiferromagnetic exchange integral of SP corresponds to the magnetic resonance peak. The kind of spin-Peierls transition applied to cuprate superconductors is that without dimerization of lattice ions and with dimerization of localized hole h(Cu) attached to the ion. Absence of the magnetic resonance peak in La-Sr-Cu-O results from the dimerized state of localized hole, h(Cu) below T-c into tetramerized phase above T-c in SP transition without dimerization of copper-ion. The checkerboard patterns with four unit cell period originate from the SP of electronic part without ion-dimerization and from charge occupation probability of oxygen-atom around Cu. (c) 2005 Elsevier Ltd. All rights reserved.