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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 | Abstract: | 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. | Source: | arXiv, cond-mat/0503167 | Services: | Forum | Review | PDF | Favorites |
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