| Issue |
Europhys. Lett.
Volume 49, Number 6, March 2000
|
|
|---|---|---|
| Page(s) | 768 - 774 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2000-00217-9 | |
| Published online | 01 September 2002 | |
Kondo effect in a one-dimensional d-wave superconductor
Theoretische Physik, ETH-Hönggerberg - CH-8093 Zürich, Switzerland
Received:
14
September
1999
Accepted:
5
January
2000
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 
-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.
PACS: 71.10.Pm – Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.) / 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) / 72.15.Qm – Scattering mechanisms and Kondo effect
© EDP Sciences, 2000
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