Abstract
Based on a simple argument, it is shown that a small concentration of holes in a single band Hubbard Hamiltonian on a quadratic lattice with moderateU/t ratio is enough to destroy the long range antiferromagnetic order in the ground state. The particular emphasis is made on the role of large amplitude zero-point quantum spin fluctuations inherent in low-dimensional spin system with the small magnitude of spinS=1/2. The relevance to the highT c superconductivity materials La2−x Sr x CuO4 is discussed.
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Takahashi, Y., Zhang, F.C. Absence of the long-range antiferromagnetic order in doped La2−x Sr x CuO4 . Z. Physik B - Condensed Matter 69, 443–447 (1988). https://doi.org/10.1007/BF01312504
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DOI: https://doi.org/10.1007/BF01312504