Ferromagnetism in an orbitally degenerate Hubbard model

Autor:	J. Kuei, Richard T. Scalettar
Rok vydání:	1997
Předmět:	Physics Ferromagnetism Condensed matter physics Electronic correlation Hubbard model Degenerate energy levels Lanczos algorithm Condensed Matter::Strongly Correlated Electrons Ground state Spin-½ Phase diagram
Zdroj:	Physical Review B. 55:14968-14974
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.55.14968
Popis:	We study the magnetic phase diagram of a one-dimensional, orbitally degenerate Hubbard model using the Lanczos algorithm to project out the ground state. Using lattices larger than those previously explored with diagonalization approaches, we find a phase diagram which is in much better agreement with a strong coupling analysis. In addition to determining the phase diagram by calculating the spin sector of minimum energy, we also show results for the spin-spin correlations and participation ratio, which further characterize the magnetic order and the itineracy of the electrons. We then describe results for the case when the intersite hybridization is different for the two orbitals. {copyright} {ital 1997} {ital The American Physical Society}
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::39837a09bb9f7f2038db5ad0d6e72677 https://doi.org/10.1103/physrevb.55.14968 Zobrazit plný text záznamu