Metal-insulator transition in the Hubbard model with incommensurate magnetic structures |
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Authors: | M A Timirgazin A K Arzhnikov V Yu Irkhin |
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Institution: | 1.Physical-Technical Institute, Ural Branch,Russian Academy of Sciences,Izhevsk,Russia;2.Institute of Metal Physics, Ural Branch,Russian Academy of Sciences,Izhevsk,Russia |
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Abstract: | The metal-insulator transition for the square, simple cubic, and body centered cubic lattices has been studied within the
Hubbard model at half-filling taking into account nearest- and next-nearest-neighbor electron hopping. Both staggered antiferromagnetic
and incommensurate magnetic states (spin-spiral wave) have been considered. The inclusion of the latter states for the three-dimensional
lattices does not change the general pattern of the metal-insulator transition, but opens the fundamentally new possibility
of the metal-insulator transition of the first order between the magnetically ordered states for the square lattice. |
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Keywords: | |
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