Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-05-12
Physics
Condensed Matter
Strongly Correlated Electrons
12 pages, 7 figures
Scientific paper
10.1103/PhysRevB.73.045109
We present a detailed account of the physics of Vanadium sesquioxide (${\rm V_2O_3}$), a benchmark system for studying correlation induced metal-insulator transition(s). Based on a detailed perusal of a wide range of experimental data, we stress the importance of multi-orbital Coulomb interactions in concert with first-principles LDA bandstructure for a consistent understanding of the PI-PM MIT under pressure. Using LDA+DMFT, we show how the MIT is of the orbital selective type, driven by large changes in dynamical spectral weight in response to small changes in trigonal field splitting under pressure. Very good quantitative agreement with ($i$) the switch of orbital occupation and ($ii$) S=1 at each $V^{3+}$ site across the MIT, and ($iii$) carrier effective mass in the PM phase, is obtained. Finally, using the LDA+DMFT solution, we have estimated screening induced renormalisation of the local, multi-orbital Coulomb interactions. Computation of the one-particle spectral function using these screened values is shown to be in excellent quantitative agreement with very recent experimental (PES and XAS) results. These findings provide strong support for an orbital-selective Mott transition in paramagnetic ${\rm V_2O_3}$.
Craco Luis
Laad Mukul S.
Müller-Hartmann Erwin
No associations
LandOfFree
Orbital selective insulator-metal transition in V2O3 under external pressure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Orbital selective insulator-metal transition in V2O3 under external pressure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Orbital selective insulator-metal transition in V2O3 under external pressure will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-162751