Kondo effect in a one dimensional d-wave superconductor

Abstract

We derive a solvable resonant-level type model, to describe an impurity spin coupled to zero-energy bound states localized at the edge of a one dimensional d-wave superconductor. This results in a two-channel Kondo effect with a quite unusual low-temperature thermodynamics. For instance, the local impurity susceptibility yields a finite maximum at zero temperature (but no logarithmic-divergence) due to the splitting of the impurity in two Majorana fermions. Moreover, we make comparisons with the Kondo effect occurring in a two dimensional d-wave superconductor.

9 pages, final version; To be published in Europhysics Letters

References in corpus (4)

• Bosonization and Strongly Correlated Systems
• Paramagnetic instability at normal-metal - superconductor interfaces
• Kondo effect in a Luttinger liquid: nonuniversality of the Wilson ratio
• Mott Insulators, Spin Liquids and Quantum Disordered Superconductivity

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