Local susceptibilities in semi-infinite antiferromagnet chains: elementary perspectives

Details Local susceptibilities in semi-infinite antiferromagnet chains: elementary perspectives Local susceptibilities in semi-infinite antiferromagnet chains: elementary perspectives

1996-11-22

arxiv.org/abs/cond-mat/9611178v1

Physics

Condensed Matter

10 pages single-column format, 1 figure, uses Revtex

Scientific paper

10.1103/PhysRevB.55.11372

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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