Magnetic impurity in a $U(1)$-Spin Liquid with a Spinon Fermi-Surface

Details Magnetic impurity in a $U(1)$-Spin Liquid with a Spinon Fermi-Surface Magnetic impurity in a $U(1)$-Spin Liquid with a Spinon Fermi-Surface

2010-12-14

arxiv.org/abs/1012.2988v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 6 figures

Scientific paper

We address the problem of a magnetic impurity in a two dimensional $U(1)$ spin liquid where the spinons have gap-less excitations near the Fermi-surface and are coupled to an emergent gap-less gauge field. Using a large N expansion we analyze the strong coupling behavior and obtain the Kondo temperature which was found to be the same as for a Fermi-liquid. In this approximation we also study the specific heat and the magnetic susceptibility of the impurity. These quantities present no deviations from the Fermi-liquid ones, consistent with the notion that the magnetic impurity is only sensitive to the local density of fermionic states.

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