İnelastic neutron scattering peak in Zn substituted YBa2Cu3O7

Abstract

The effects of nonmagnetic impurities on the Q = (pi, pi) spin-fluctuation spectral weight are studied in the normal state using the framework of the Hubbard model. It is shown that the impurity scattering of the spin fluctuations with momentum transfers near 2k(F) could lead to a peak in Im chi (Q, omega) at omega = 2\mu\, where mu is the chemical potential. the results on the single-layer and the bilayer CuO2 models are compared with the neutron scattering data on Zn substituted YBa2Cu3O7.