Coulomb Correlations and Orbital Polarization in the Metal Insulator Transition of VO_2

Details Coulomb Correlations and Orbital Polarization in the Metal Insulator Transition of VO_2 Coulomb Correlations and Orbital Polarization in the Metal Insulator Transition of VO_2

2003-10-09

arxiv.org/abs/cond-mat/0310216v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, replaces cond-mat/0310216

Scientific paper

The quasi-particle spectra in the metallic rutile and insulating monoclinic phases of VO$_2$ are shown to be dominated by local Coulomb interactions. In the rutile phase the small orbital polarization among V 3d t_2g states leads to weak static but strong dynamical correlations. In the monoclinic phase the large 3d orbital polarization caused by the V--V Peierls distortion gives rise to strong static correlations which are shown to be the primary cause of the insulating behavior.

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