Thermal transport in a spin-1/2 Heisenberg chain coupled to a (non) magnetic impurity

Details Thermal transport in a spin-1/2 Heisenberg chain coupled to a (non) magnetic impurity Thermal transport in a spin-1/2 Heisenberg chain coupled to a (non) magnetic impurity

2010-02-03

arxiv.org/abs/1002.0717v1

Physical Review B 81, 205101 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 12 figures

Scientific paper

10.1103/PhysRevB.81.205101

We explore the effect of a (non) magnetic impurity on the thermal transport of the spin-1/2 Heisenberg chain model. This unique system allows to probe Kondo-type phenomena in a prototype strongly correlated system. Using numerical diagonalization techniques we study the scaling of the frequency dependent thermal conductivity with system size and host-impurity coupling strength as well as the dependence on temperature. We focus in particular on the analysis of cutting-healing of weak links or a magnetic impurity by the host chain via Kondo-like screening as the temperature is lowered.

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