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

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

2005-07-13

arxiv.org/abs/cond-mat/0507312v2

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, the background information is added

Scientific paper

10.1103/PhysRevLett.95.186404

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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