Exceptional Ising Magnetic Behavior of Itinerant Spin-polarized Carriers in URu2Si2
Abstract
We show on the basis of electronic structure calculations that the uranium 5f magnetic moment in URu2Si2 exhibits a unique Ising behavior, which surprisingly, arises from itinerant electronic states. The origin of the unusual Ising behavior is analyzed as due to the peculiar near-Fermi edge nested electronic structure of URu2Si2 involving its strong spin-orbit interaction. The Ising anisotropy has pertinent implications for theories applicable to explaining the Hidden Order phase in URu2Si2.
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