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29 March 2024
 
  » arxiv » cond-mat/0503167

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Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4
Y. Chen ; Wei Bao ; Y. Qiu ; J.E. Lorenzo ; J.L. Sarrao ; D.L. Ho ; Min Y. Lin ;
Date 8 Mar 2005
Subject Disordered Systems and Neural Networks; Superconductivity | cond-mat.dis-nn cond-mat.supr-con
AbstractIn conventional spin glasses, the magnetic interaction is not strongly anisotropic and the entire spin system freezes at low temperature. In La2(Cu,Li)O4, for which the in-plane exchange interaction dominates the interplane one, only a fraction of spins with antiferromagnetic correlations extending to neighboring planes become spin-glass. The remaining spins with only in-plane antiferromagnetic correlations remain spin-liquid at low temperature. Such a novel partial spin freezing out of a spin-liquid observed in this cold neutron scattering study is likely due to a delicate balance between disorder and quantum fluctuations in the quasi-two dimensional S=1/2 Heisenberg system.
Source arXiv, cond-mat/0503167
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