Screening of an external magnetic field by spin currents: the infinite U Hubbard modelReport as inadecuate




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Abstract : The infinite U Hubbard model with a single hole in the presence of an external orbital magnetic field is studied on a finite cluster for several geometries. Exact diagonalization results for the energy, total spin and several spin correlation functions are presented. They strongly support the idea of the compensation of the applied flux by a flictitious flux induced by a non-coplanar spin background. A variational study also shows evidence of this phenomenon.





Author: Jean-Christian Anglès d-Auriac Benoît Douçot

Source: https://hal.archives-ouvertes.fr/



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