arxiv: cond-mat/0507312 · v2 · submitted 2005-07-13 · ❄️ cond-mat.str-el

Crossed spin-1/2 Heisenberg chains as a quantum impurity problem

S. A. Reyes , A. M. Tsvelik This is my paper

classification ❄️ cond-mat.str-el

keywords chainscrossedheisenbergmodelspin-1calculatedcorrelationcoupling

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Using equivalencies between different models we reduce the model of two spin-1/2 Heisenberg chains crossed at one point to the model of free fermions. The spin-spin correlation function is calculated by summing the perturbation series in the interchain coupling. The result reveals a power law decay with a nonuniversal exponent.

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Crossed spin-1/2 Heisenberg chains as a quantum impurity problem

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