Phases of the 2D Hubbard model at low doping
A. V. Chubukov, K. A. Musaelian
Abstract
We show that the planar spiral phase of the 2D Hubbard model at low doping, x, is unstable towards a noncoplanar spin configuration. The novel equilibrium state we found at low doping is incommensurate with the inverse pitch of the spiral varying as x(1/2), but nevertheless has a dominant peak in the susceptibility at (π,π). Relevance to the NMR and neutron scattering experiments in La2-xSrxCuO4 is disccussed.
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