Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102336
Title: Spiral magnetism in the single-band Hubbard model: The Hartree-Fock and slave-boson approaches
Authors: Igoshev, P. A.
Timirgazin, M. A.
Gilmutdinov, V. F.
Arzhnikov, A. K.
Irkhin, V. Yu.
Issue Date: 2015
Publisher: Institute of Physics Publishing
Citation: Spiral magnetism in the single-band Hubbard model: The Hartree-Fock and slave-boson approaches / P. A. Igoshev, M. A. Timirgazin, V. F. Gilmutdinov, et al. — DOI 10.1088/0953-8984/27/44/446002 // Journal of Physics Condensed Matter. — 2015. — Vol. 27. — Iss. 44. — 446002.
Abstract: The ground-state magnetic phase diagram is investigated within the single-band Hubbard model for square and different cubic lattices. The results of employing the generalized non-correlated mean-field (Hartree-Fock) approximation and generalized slave-boson approach by Kotliar and Ruckenstein with correlation effects included are compared. We take into account commensurate ferromagnetic, antiferromagnetic, and incommensurate (spiral) magnetic phases, as well as phase separation into magnetic phases of different types, which was often lacking in previous investigations. It is found that the spiral states and especially ferromagnetism are generally strongly suppressed up to non-realistically large Hubbard U by the correlation effects if nesting is absent and van Hove singularities are well away from the paramagnetic phase Fermi level. The magnetic phase separation plays an important role in the formation of magnetic states, the corresponding phase regions being especially wide in the vicinity of half-filling. The details of non-collinear and collinear magnetic ordering for different cubic lattices are discussed. � 2015 IOP Publishing Ltd.
Keywords: HUBBARD MODEL
MAGNETIC PHASE DIAGRAM
NON-COLLINEAR MAGNETISM
SLAVE BOSONS
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
BOSONS
CORRELATION DETECTORS
FERROMAGNETISM
GROUND STATE
HARTREE APPROXIMATION
HUBBARD MODEL
MOLECULAR PHYSICS
PHASE DIAGRAMS
PHASE SEPARATION
ANTIFERROMAGNETICS
CORRELATION EFFECT
MAGNETIC PHASE DIAGRAMS
MAGNETIC PHASE SEPARATION
NON-COLLINEAR MAGNETISM
SINGLE-BAND HUBBARD MODEL
SLAVE BOSONS
VAN HOVE SINGULARITIES
MAGNETISM
URI: http://hdl.handle.net/10995/102336
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84946058376
PURE ID: 544210
5c465f8c-1e5e-4369-ae4e-890094010f2c
ISSN: 9538984
DOI: 10.1088/0953-8984/27/44/446002
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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