DOES FRUSTRATION DESCRIBE DOPING IN MODELS FOR HIGH-TEMPERATURE SUPERCONDUCTORS

We compare predictions of frustrated and doped Hamiltonians by studying the t-J model with one hole and the frustrated Heisenberg J-J' model. In particular, we compare for both systems the dynamic spin-spin structure factor S(q, omega), and the B1g Raman scattering spectrum R(omega) at zero temperature. We observe that, for the t-J model, both quantities are in qualitative agreement with experimental measurements while the corresponding ones for the J-J' model are not. These results indicate that doped systems cannot be accurately modeled by a purely spin model and that the latter, including the chiral spin states, might not be relevant to describe measurable quantities of the high-T(c) materials.