Kondo physics and dissipation: A numerical renormalization-group approach to Bose-Fermi Kondo models

Details Kondo physics and dissipation: A numerical renormalization-group approach to Bose-Fermi Kondo models Kondo physics and dissipation: A numerical renormalization-group approach to Bose-Fermi Kondo models

2006-09-22

arxiv.org/abs/cond-mat/0609589v2

Phys. Rev. B 75, 104410 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

26 pages, 36 figures

Scientific paper

10.1103/PhysRevB.75.104410

We extend the numerical renormalization-group method to treat Bose-Fermi Kondo models (BFKMs) describing a local moment coupled both to a conduction band and to a dissipative bosonic bath representing, e.g., lattice or spin collective excitations of the environment. We apply the method to the Ising-symmetry BFKM with a structureless band and a bath spectral function \eta(\omega)\propto \omega^s. The method is valid for all bath exponents s and all temperatures T. For 0

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