Anderson Impurity in Helical Metal

Details Anderson Impurity in Helical Metal Anderson Impurity in Helical Metal

2009-10-16

arxiv.org/abs/0910.3031v5

Phys. Rev. B 81, 235411 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

The published version

Scientific paper

We use a trial wave function to study the spin-1/2 Kondo effect of a helical metal on the surface of a three-dimensional topological insulator. While the impurity spin is quenched by conduction electrons, the spin-spin correlation of the conduction electron and impurity is strongly anisotropic in both spin and spatial spaces. As a result of strong spin-orbit coupling, the out-of-plane component of the impurity spin is found to be fully screened by the orbital angular momentum of the conduction electrons.

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