Structure of the spin-glass state of La2-xSrxCuO4: the spiral theory |
| |
Authors: | Lüscher Andreas Milstein Alexander I Sushkov Oleg P |
| |
Institution: | School of Physics, University of New South Wales, Sydney 2052, Australia. |
| |
Abstract: | Starting from the t-J model, we derive the effective field theory describing the spin dynamics in insulating La(2-x)Sr(x)CuO(4), x approximately < 0.055, at low temperature. The theory results in a disordered spiral ground state, in which the staggered component of the copper spins is confined in a plane determined by the spin anisotropies. The static spin structure factor obtained in our calculations is in perfect agreement with neutron scattering data over the whole range of doping in both, the Néel and the spin-glass phase. We show that topological defects (spin vortex-antivortex pairs) are an intrinsic property of the disordered spiral ground state. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|