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Local susceptibilities in semi-infinite antiferromagnet chains: elementary perspectives

Martin P. Gelfand·Elisabeth F. Gloeggler
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Abstract

Using conformal field theory methods Eggert and Affleck have shown that the semi-infinite S=1/2 Heisenberg antiferromagnetic chain exhibits a remarkable alternation in its local response to a uniform field at low temperatures. Such alternation is not an essentially quantum effect: similar, and sometimes stronger, susceptibility alternation is a feature of classical Heisenberg-Ising chains at T=0. In S=1/2 chains, susceptibility alternation is not unique to the Heisenberg model, but can be seen in expansions about the Ising model and also in the XY model.

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Martin P. Gelfand, Elisabeth F. Gloeggler. 1996-11-22. Local susceptibilities in semi-infinite antiferromagnet chains: elementary perspectives. https://doi.org/10.1103/physrevb.55.11372

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