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 ϕ from 0 to π 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 ϕc, 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2008
- DOI:
- 10.1103/PhysRevLett.100.037202
- arXiv:
- arXiv:0706.4423
- Bibcode:
- 2008PhRvL.100c7202W
- Keywords:
-
- 75.10.Lp;
- 71.10.Fd;
- 71.10.Hf;
- 71.27.+a;
- Band and itinerant models;
- Lattice fermion models;
- Non-Fermi-liquid ground states electron phase diagrams and phase transitions in model systems;
- Strongly correlated electron systems;
- heavy fermions;
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Statistical Mechanics
- E-Print:
- 4 pages, 5 figures, 1 table