Incommensurate spin dynamics of superconductor YBa_2Cu_3O_(6+x)

摘要

According to the recehnt neutron scattering data on YBa_2Cu_3O_(6+x), it has been concluded that the incommensurability of the spin dynamics is a common feature among oxide high-T_c superconductors, which cannot be explainable by Fermi surface anomaly. In this paper, we summarize neutron data on the incommensurability and show a strong correlation between it and superconductivity, for which spin singlet formation in the spin stripe could play an important role.