Tuesday, March 27, 2012

1203.5354 (Daniel Grieger et al.)

Approaching finite-temperature phase diagrams of strongly correlated
materials: a case study for V$_2$O$_3$
   [PDF]

Daniel Grieger, Christoph Piefke, Oleg E. Peil, Frank Lechermann
Examining phase stabilities and phase equilibria in strongly correlated materials asks for a next level in the many-body extensions to the local-density approximation (LDA) beyond mainly spectroscopic assessments. Here we put the charge-selfconsistent LDA+dynamical mean-field theory (DMFT) methodology based on projected local orbitals for the LDA+DMFT interface and a tailored pseudopotential framework into action in order to address such thermodynamics of realistic strongly correlated systems. Namely a case study for the electronic phase diagram of the well-known prototype Mott-phenomena system V$_2$O$_3$ at higher temperatures is presented. We are able to describe the first-order metal-to-insulator transitions with negative pressure and temperature from the self-consistent computation of the correlated total energy in line with experimental findings.
View original: http://arxiv.org/abs/1203.5354

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