Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102364
Title: Correlation effects and non-collinear magnetism in the doped Hubbard model
Authors: Igoshev, P. A.
Timirgazin, M. A.
Gilmutdinov, V. F.
Arzhnikov, A. K.
Irkhin, V. Yu.
Issue Date: 2015
Publisher: Elsevier
Citation: Correlation effects and non-collinear magnetism in the doped Hubbard model / P. A. Igoshev, M. A. Timirgazin, V. F. Gilmutdinov, et al. — DOI 10.1016/j.jmmm.2014.10.031 // Journal of Magnetism and Magnetic Materials. — 2015. — Vol. 383. — P. 2-7.
Abstract: The ground-state magnetic phase diagram is investigated for the two-and three-dimensional t-t′ Hubbard model. We take into account commensurate ferro-, antiferromagnetic, and incommensurate (spiral) magnetic phases, as well as phase separation into magnetic phases of different types, which was often missed in previous investigations. We trace the influence of correlation effects on the stability of both spiral and collinear magnetic order by comparing the results of employing both the generalized non-correlated mean-field (Hartree-Fock) approximation and generalized slave boson approach by Kotliar and Ruckenstein with correlation effects included. We found that the spiral states and especially ferromagnetism are generally strongly suppressed up to non-realistic large Hubbard U, if the correlation effects are taken into account. The electronic phase separation plays an important role in the formation of magnetic states and corresponding regions are wide, especially in the vicinity of half-filling. The details of magnetic ordering for different cubic lattices are discussed. © 2014 Elsevier B.V. All rights reserved.
Keywords: BAND MAGNETISM
ELECTRONIC CORRELATION
INCOMMENSURATE MAGNETISM
ANTIFERROMAGNETISM
CORRELATION DETECTORS
FERROMAGNETISM
GROUND STATE
HARTREE APPROXIMATION
HUBBARD MODEL
MAGNETISM
PHASE SEPARATION
ANTIFERROMAGNETICS
BAND MAGNETISM
CORRELATION EFFECT
ELECTRONIC CORRELATION
ELECTRONIC PHASE SEPARATION
INCOMMENSURATE MAGNETISM
MAGNETIC PHASE DIAGRAMS
NON-COLLINEAR MAGNETISM
MAGNETIC FIELD EFFECTS
URI: http://hdl.handle.net/10995/102364
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84940003104
PURE ID: 313548
90805fd5-efa8-4c7b-ba5c-289ba6293295
ISSN: 3048853
DOI: 10.1016/j.jmmm.2014.10.031
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

Files in This Item:
File Description SizeFormat 
2-s2.0-84940003104.pdf123,67 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.