Abstract
AbstractWe study the periodic Anderson model under a magnetic field by the Gutzwiller method. We find that the Fermi surface changes from the large Fermi‐surface in the paramagnetic state to the small Fermi‐surface continuously by a magnetic field.Between these two states, we find a half‐metallic state, where the Fermi surface for the majority spin disappears. We also investigate the magnetic field dependence of the effective mass. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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