EXACT GROUND-STATES FOR THE HUBBARD-MODEL ON THE KAGOME LATTICE
EXACT GROUND-STATES FOR THE HUBBARD-MODEL ON THE KAGOME LATTICE
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DOI:
10.1088/0305-4470/25/16/011
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发表时间:
1992-08-21
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影响因子:
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通讯作者:
MIELKE, A
中科院分区:
文献类型:
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作者:
MIELKE, A
We give a complete and rigorous description of the ground states of the Hubbard model on the Kagome lattice for electron densities n greater-than-or-equal-to 5/3 and U > 0. If 11/6 > n greater-than-or-equal-to 5/3 the system shows a ferromagnetic behaviour at zero temperature. If n is above 11/6 the system is paramagnetic. The proof of these results uses some graph-theoretic methods. The results are applicable to all line graphs of planar lattices, of which the Kagome lattice is an example.