Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102066
Title: Magnetic phase transitions and unusual antiferromagnetic states in the Hubbard model
Authors: Igoshev, P. A.
Timirgazin, M. A.
Arzhnikov, A. K.
Irkhin, V. Y.
Issue Date: 2018
Publisher: Elsevier B.V.
Citation: Magnetic phase transitions and unusual antiferromagnetic states in the Hubbard model / P. A. Igoshev, M. A. Timirgazin, A. K. Arzhnikov, et al. — DOI 10.1016/j.jmmm.2017.10.007 // Journal of Magnetism and Magnetic Materials. — 2018. — Vol. 459. — P. 311-316.
Abstract: Ground state magnetic phase diagrams of the square and simple cubic lattices are investigated for the narrow band Hubbard model within the slave-boson approach by Kotliar and Ruckenstein. The transitions between saturated (half-metallic) and non-saturated ferromagnetic phases as well as similar transition in antiferromagnetic (AFM) state are considered in the three-dimensional case. Two types of saturated antiferromagnetic state with different concentration dependences of sublattice magnetization are found in the two-dimensional case in the vicinity of half-filling: the state with a gap between AFM subbands and AFM state with large electron mass. The latter state is hidden by the phase separation in the finite-U case. © 2017 Elsevier B.V.
Keywords: ANTIFERROMAGNETISM
FRUSTRATION
HUBBARD MODEL
NON-COLLINEAR MAGNETISM
SLAVE BOSONS
ANTIFERROMAGNETISM
BOSONS
GROUND STATE
HUBBARD MODEL
PHASE DIAGRAMS
PHASE SEPARATION
ANTIFERROMAGNETIC STATE
CONCENTRATION DEPENDENCE
FRUSTRATION
MAGNETIC PHASE DIAGRAMS
MAGNETIC PHASE TRANSITIONS
NON-COLLINEAR MAGNETISM
SLAVE BOSONS
SUBLATTICE MAGNETIZATION
MAGNETISM
URI: http://hdl.handle.net/10995/102066
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85031104121
PURE ID: 7276123
4e1f232f-c4c2-4e27-b08f-a85b8886b2bf
ISSN: 3048853
DOI: 10.1016/j.jmmm.2017.10.007
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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