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Starting from the t-J model, we derive an effective field theory describingthe spin dynamics in the insulating phase of La_{2-x}Sr_xCuO_4, x < 0.055, atlow temperature. Using Monte Carlo simulations, we show that the destruction ofNeel order is driven by the single-hole localization length kappa. A phasetransition at 2% doping is consistent with the value of kappa known from thevariable range hopping conductivity. The static spin structure factor obtainedin our calculations is in perfect agreement with neutron scattering data overthe whole range of doping. We also demonstrate that topological defects (spinvortex-antivortex pairs) are an intrinsic property of the spin-glass groundstate.Comment: 4 pages, 2 figure

physical review letters

Structure of the Spin-Glass State of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>La</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>CuO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>: The Spiral Theory

Structure of the Spin-Glass State ofLa2−xSrxCuO4: The Spiral Theory