2006/06/27 by Andreas Lüscher, Andreas Luscher, A. I. Milstein +3
Chemistry · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Atomic physics #Chemistry #Condensed matter physics #Crystallography #Ground state #Magnetic properties of thin films #Neutron scattering #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Scattering #Spin (aerodynamics) #Spin glass #Spins #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.98.037001
published as Phys. Rev. Lett. 98, 037001 (2007) · 4 pages, 2 figures
arxiv created 2006/06/27 · openalex publication_date 2007/01/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.