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arXiv:cond-mat/9801294 · Springer series in solid-state sciences

Quantum Magnetism Approaches to Strongly Correlated Electrons

Assa Auerbach, F. Berruto, Luca Capriotti

Published Jan 1, 2000• 3 citations
arXivHTMLPDF
DOI
10.1007/978-3-662-04273-1_5

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An interplay between kinetic process and magnetic ordering is manifested when strong correlation and electronic frustration are present: tuning a staggered flux phi from 0 to pi makes the ground state (GS) of an infinite-U Hubbard model change abruptly from a Nagaoka-type ferromagnet to a Haerter-Shastry-type antiferromagnet at a phi_(c), with both states being metallic and of kinetic origin. Intraplaquette spin correlation, as well as nonanalyticity in the GS energy, signals such a novel quantum criticality. This tunable kinetic magnetism is generic and may be experimentally realized.