title: Tuning kinetic magnetism of strongly correlated electrons via a staggered flux.
abstract: 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.
authors.affiliation: National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Yi-Fei
authors.initials: YF
authors.lastname: Wang
authors.forename: Chang-De
authors.initials: CD
authors.lastname: Gong
authors.forename: Z D
authors.initials: ZD
authors.lastname: Wang