Condensed-Matter Physics & Materials Science Seminar

The first principles description of strongly-correlated materials is currently regarded as one of the greatest challenges in condensed matter physics. In contrast to the weakly-correlated materials, one-particle picture based on the Fermi liquid theory fails because electrons in strongly-correlated materials are neither fully localized on the atomic sites nor fully itinerant in the crystal. One of the most successful approaches to strongly-correlated materials is the dynamical mean field theory (DMFT). Its successes revived the interest in the long-sought goal of achieving a diagrammatically controlled ab initio theory by combining GW and DMFT Feynman graphs. In this talk, I'll introduce GW+DMFT approaches and present our new methodology grounded on the combination of the quasiparticle self-consistent GW approximation (QSGW) and DMFT. I will also show how QSGW+DMFT approach improves the spectral properties of open-d and -f shell systems in comparison to other theories. I will conclude with the challenges ahead and its potential roles in materials design.