Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session C45: Metal Insulator Transitions: VO2, Vanadates, and Nickelates
2:30 PM–5:18 PM,
Monday, March 5, 2018
LACC
Room: 505
Sponsoring
Unit:
DCMP
Chair: Ivan Schuller, Univ of California - San Diego
Abstract ID: BAPS.2018.MAR.C45.13
Abstract: C45.00013 : Metal insulator transition to a partial disordered state in the 1/3 filled Hubbard model on a triangular lattice
4:54 PM–5:06 PM
Presenter:
Matthew Enjalran
(Physics, Southern Conn State Univ)
Authors:
Matthew Enjalran
(Physics, Southern Conn State Univ)
Richard Scalettar
(Physics, University of California, Davis)
facilitates the emergence of novel electronic phases in both material and model systems.
In the Hubbard on the triangular lattice, one can study of the effect of all three components
on the formation of collective states of charge and magnetic degrees of freedom. We
present results from a mean-field study of the 1/3 filled Hubbard model on the triangular
lattice. With on-site interactions (U) only, we observe a two step process in the ground state
where a paramagnetic metal develops noncollinear magnetic correlations at a finite interaction
strength, U*/t ≈ 4.70, followed by a metal insulator transition (MIT) to a charge ordered and
partial ordered magnetic state at Uc/t ≈ 5.10. In the insulating phase, excess charge density
and collinear antiferromagnetic order define a honeycomb substructure of the parent triangular
lattice. The remaining sites defining a triangular substructure contain reduced charge density
and are paramagnetic. For U/t > Uc/t, the MIT occurs at Tc/t ≈ 0.16 and is weakly first order.
The effects of filling, frustration, and nearest neighbor Coulomb repulsion V on the MIT
are discussed briefly.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.C45.13
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