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Ferromagnetism for the hubbard model in the alloy analogy approximation
Author(s) -
Schneider J.,
Drchal V.
Publication year - 1975
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220680119
Subject(s) - ferromagnetism , hubbard model , analogy , condensed matter physics , paramagnetism , alloy , ground state , coherent potential approximation , physics , materials science , quantum mechanics , electronic structure , metallurgy , superconductivity , philosophy , linguistics
The stability of the strongly ferromagnetic ground state in the Hubbard model for U → ∞ is investigated, using the Hubbard alloy analogy result. In this approximation the saturated ferromagnetic state is not stable for a nearly half‐filled band. In fact, for n < 1, only the paramagnetic solution exists.
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