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Magnetic solutions of the Hubbard model
Author(s) -
Schumacher W.,
Lindner U.,
Jauch R.
Publication year - 1978
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.2220860223
Subject(s) - hubbard model , antiferromagnetism , condensed matter physics , ferromagnetism , magnetization , lattice (music) , simple (philosophy) , physics , quantum mechanics , magnetic field , superconductivity , acoustics , philosophy , epistemology
Abstract Existence and stability of antiferromagnetic and of ferromagnetic solutions of the Hubbard model are investigated in the framework of the Hartree‐Fock approximation. It is found that the Hubbard model for simple cubic lattice and certain parameters admits stable magnetic solutions in a finite temperature range, even in cases, where for these parameters at T = 0 no magnetic ordering exists (so‐called heat magnetization).