Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-11-07
J. Phys.: Condens. Matter 21, 064209 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
9 pages, 4 figures
Scientific paper
10.1088/0953-8984/21/6/064209
Vanadium sesquioxide, V2O3, boasts a rich phase diagram whose description necessitates the accounting for many-body Coulomb correlations. Spectral properties of this compound have been successfully addressed within dynamical mean field theory to an extent that results of recent angle resolved photoemission experiments have been correctly predicted. While photoemission spectroscopy probes the occupied part of the one-particle spectrum, optical experiments measure transitions into empty states and thus provide complementary information. In this work, we focus on the optical properties of V2O3 in its paramagnetic phases by employing our recently developed "generalized Peierls approach". Compared to experiments, we obtain results in overall satisfactory agreement. Further, we rationalize that the experimentally observed temperature dependence stems from the different coherence scales of the involved charge carriers.
Biermann Silke
Tomczak Jan M.
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