Numerical Renormalization Group Study of Kondo Effect in Unconventional Superconductors

Details Numerical Renormalization Group Study of Kondo Effect in Unconventional Superconductors Numerical Renormalization Group Study of Kondo Effect in Unconventional Superconductors

2000-11-15

arxiv.org/abs/cond-mat/0011256v2

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures, JPSJ.sty, to be published in J. Phys. Soc. Jpn. 70 (2001) No. 10

Scientific paper

10.1143/JPSJ.70.2860

Orbital degrees of freedom of a Cooper pair play an important role in the unconventional superconductivity. To elucidate the orbital effect in the Kondo problem, we investigated a single magnetic impurity coupled to Cooper pairs with a $p_x +i p_y$ ($d_{x^2-y^2}+id_{xy}$) symmetry using the numerical renormalization group method. It is found that the ground state is always a spin doublet. The analytical solution for the strong coupling limit explicitly shows that the orbital dynamics of the Cooper pair generates the spin 1/2 of the ground state.

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