Charge Ordered Insulator without Magnetic Order Studied by Correlator Projection Method
From MaRDI portal
Publication:3374556
DOI10.1143/JPSJ.74.2769zbMATH Open1084.82016arXivcond-mat/0506240MaRDI QIDQ3374556
Author name not available (Why is that?)
Publication date: 9 March 2006
Published in: (Search for Journal in Brave)
Abstract: The Hubbard model with additional intersite interaction `' (the extended Hubbard model) is investigated by the correlator projection method (CPM). CPM is a newly developed numerical method which combines the equation-of-motion approach and the dynamical mean-field theory. Using this method, properties of the extended Hubbard Model at quarter filling are discussed with special emphasis on the metal-insulator transition induced by electron-electron correlations. The result shows a metal-insulator transition to a charge ordered insulator with antiferromagnetic order at low temperatures, but a charge ordered insulator without magnetic symmetry breaking at intermediate temperatures. Here, the magnetic order is found to be suppressed to low temperatures because of the smallness of the exchange coupling . The present results are in sharp contrast with the Hatree-Fock approximation whereas in agreement with the experimental results on quarter-filled materials with strong correlations, such as organic conductors.
Full work available at URL: https://arxiv.org/abs/cond-mat/0506240
No records found.
No records found.
This page was built for publication: Charge Ordered Insulator without Magnetic Order Studied by Correlator Projection Method
Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q3374556)
