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Kondo screening in d-wave superconductors in a Zeeman field and implications for STM spectra of Zn-doped cuprates

Matthias Vojta·Robert Zitzler·Ralf Bulla·Thomas Pruschke
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Abstract

We consider the screening of an impurity moment in a d-wave superconductor under the influence of a Zeeman magnetic field. Using the Numerical Renormalization Group technique, we investigate the resulting pseudogap Kondo problem, in particular the field-induced crossover behavior in the vicinity of the zero-field boundary quantum phase transition. The impurity spectral function and the resulting changes in the local host density of states are calculated, giving specific predictions for high-field STM measurements on impurity-doped cuprates.

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Matthias Vojta, Robert Zitzler, Ralf Bulla, Thomas Pruschke. 2002-11-27. Kondo screening in d-wave superconductors in a Zeeman field and implications for STM spectra of Zn-doped cuprates. https://doi.org/10.1103/physrevb.66.134527

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