Dissipative dynamics of an extended magnetic nanostructure: Spin necklace in a metallic environment

Details Dissipative dynamics of an extended magnetic nanostructure: Spin necklace in a metallic environment Dissipative dynamics of an extended magnetic nanostructure: Spin necklace in a metallic environment

2003-05-22

arxiv.org/abs/cond-mat/0305534v1

Phys. Rev. Lett. 91, 147204 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.91.147204

We study theoretically the dynamics of an ``xxz'' spin necklace coupled to a conduction electron sea, a model system for a nanostructure in a dissipative environment. We extract the long-time behavior via a mapping to a multichannel Coulomb gas problem followed by a scaling analysis. The strong quantum fluctuations of the necklace cause a nontrivial dependence of couplings on system size which we extract via an analysis involving the ``boundary condition changing operator'', and confirm via a detailed numerical evaluation of one case.

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