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arXiv · 1409.6068

Local magnetization nucleated by non-magnetic impurities in Fe-based superconductors

Maria N. Gastiasoro·Brian M. Andersen
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Abstract

We study impurity-induced magnetic order within a five-band Hubbard model relevant to the normal paramagnetic phase of iron-based superconductors. The existence of the local magnetic order is explained in terms of an impurity-enhancement of states near the Fermi level, and we map out the resulting phase diagram of the existence of magnetization as a function of impurity strength and Coulomb correlations. In particular, the presence of impurity-induced magnetism in only a certain range of potential scattering strengths can be understood from the specific behavior of the impurity resonant state.

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Maria N. Gastiasoro, Brian M. Andersen. 2014-09-22. Local magnetization nucleated by non-magnetic impurities in Fe-based superconductors. https://doi.org/10.1007/s10948-014-2908-2

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