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In conventional spin glasses, magnetic interaction is not stronglyanisotropic and the entire spin system is believed to be frozen below thespin-glass transition temperature. In La2Cu0.94Li0.06O4, for which the in-planeexchange interaction dominates the interplane one, only a fraction of spinswith antiferromagnetic correlations extending to neighboring planes becomespin-glass. The remaining spins with only in-plane antiferromagneticcorrelations remain spin-liquid at low temperature. Such a novel partial spinfreezing out of a two-dimensional spin-liquid observed in this cold neutronscattering study is likely due to a delicate balance between disorder andquantum fluctuations in the quasi-two dimensional S=1/2 Heisenberg system.Comment: 6 pages, 4 figure

physical review. b, condensed matter and materials physics

Slow spin-glass and fast spin-liquid components in quasi-two-dimensional<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>La</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mi>Cu</mml:mi><mml:mo>,</mml:mo><mml:mi>Li</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Slow spin-glass and fast spin-liquid components in quasi-two-dimensionalLa2(Cu,Li)O4