Work

Insulating behavior with spin and charge order in the ionic Hubbard model

Year: 2009

Type: article

Abstract: Paramagnetic solutions of the ionic Hubbard model at half-filling in dimensions $D>2$ indicate that the band and the Mott insulator phases are separated by a metallic phase. We present zero-temperature dynamical mean-field theory solutions, which include antiferromagnetic long-range order and show that the one-particle spectral functions always possess an energy gap, and therefore the system is insulating for all interaction strengths. The staggered charge-density modulation coexists with antiferromagnetic long-range order of N\'eel type.

Source: Physical Review B

DOI: 10.1103/physrevb.79.121103

Authors: Krzysztof Byczuk, Michael Sekania, Walter Hofstetter, Arno P. Kampf

Institutions: University of Warsaw, University of Augsburg, Goethe University Frankfurt

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Augsburg University, Deutsche Forschungsgemeinschaft

OpenAlex ID: W1978926030

FWCI: 2.296

Cites: 34

Cited by: 41

Related to: 10