Orbital-selective Mott transitions in the 2-band J_z-model: a high-precision quantum Monte Carlo study
Strongly Correlated Electrons
2007-05-23 v1
Abstract
Using high-precision quantum Monte Carlo (QMC) simulations within the framework of dynamical mean field theory (DMFT), we show that the anisotropic degenerate two-orbital Hubbard model contains two consecutive orbital-selective Mott transitions (OSMTs) even in the absence of spin-flip terms and pair-hopping processes. In order to reveal the second transition we carefully analyze the low-frequency part of the self-energy and the local spectral functions. This paper extends our previous work to lower temperatures. We discuss the nature - in particular the order - of both Mott transitions and list various possible extensions.
Keywords
Cite
@article{arxiv.cond-mat/0507682,
title = {Orbital-selective Mott transitions in the 2-band J_z-model: a high-precision quantum Monte Carlo study},
author = {P. G. J. van Dongen and C. Knecht and N. Blümer},
journal= {arXiv preprint arXiv:cond-mat/0507682},
year = {2007}
}
Comments
4 pages, pss style; presented at conference "Physics of Magnetism", Poznan (Poland), June 24-27, 2005