Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4

Details Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4 Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4

2005-03-08

arxiv.org/abs/cond-mat/0503167v1

Phys. Rev. B 72, 184401 (2005)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 figures

Scientific paper

In 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.

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