Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters

In this study, the ground state energies of face-centered cubic Hubbard clusters are analyzed using the Lanczos method. Examination of the ground state energy as a function of the number of particle per site n showed an energy minimum for face-centered cubic structures. This energy minimum decreased...

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Main Authors:	Souza, T. X. R., Macedo, C. A.
Format:	Online
Language:	English
Published:	Public Library of Science 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5008641/

id	pubmed-5008641
recordtype	oai_dc
spelling	pubmed-50086412016-09-27 Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters Souza, T. X. R. Macedo, C. A. Research Article In this study, the ground state energies of face-centered cubic Hubbard clusters are analyzed using the Lanczos method. Examination of the ground state energy as a function of the number of particle per site n showed an energy minimum for face-centered cubic structures. This energy minimum decreased in n with increasing coulombic interaction parameter U. We found that the ground state energy had a minimum at n = 0.6, when U = 3W, where W denotes the non-interacting energy bandwidth and the face-centered cubic structure was ferromagnetic. These results, when compared with the properties of nickel, shows strong similarity with other finite temperature analyses in the literature and supports the Hirsh’s conjecture that the interatomic direct exchange interaction dominates in driving the system into a ferromagnetic phase. Public Library of Science 2016-09-01 /pmc/articles/PMC5008641/ /pubmed/27583653 http://dx.doi.org/10.1371/journal.pone.0161549 Text en © 2016 Souza, Macedo http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Souza, T. X. R. Macedo, C. A.
spellingShingle	Souza, T. X. R. Macedo, C. A. Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters
author_facet	Souza, T. X. R. Macedo, C. A.
author_sort	Souza, T. X. R.
title	Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters
title_short	Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters
title_full	Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters
title_fullStr	Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters
title_full_unstemmed	Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters
title_sort	ferromagnetic ground states in face-centered cubic hubbard clusters
description	In this study, the ground state energies of face-centered cubic Hubbard clusters are analyzed using the Lanczos method. Examination of the ground state energy as a function of the number of particle per site n showed an energy minimum for face-centered cubic structures. This energy minimum decreased in n with increasing coulombic interaction parameter U. We found that the ground state energy had a minimum at n = 0.6, when U = 3W, where W denotes the non-interacting energy bandwidth and the face-centered cubic structure was ferromagnetic. These results, when compared with the properties of nickel, shows strong similarity with other finite temperature analyses in the literature and supports the Hirsh’s conjecture that the interatomic direct exchange interaction dominates in driving the system into a ferromagnetic phase.
publisher	Public Library of Science
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5008641/
_version_	1613641631756451840

Ferromagnetic Ground States in Face-Centered Cubic Hubbard Clusters

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