2007/04/30 by Philipp Werner, Andrew J. Millis · 10 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic orbital #Condensed matter physics #Coulomb #Coupling (piping) #Crystal field theory #Dynamical mean field theory #Electron #Hubbard model #Ion #Magnetic and transport properties of perovskites and related materials #Materials science #Mott insulator #Mott transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Strongly correlated material #Superconductivity #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.99.126405
published as Phys. Rev. Lett. 99, 126405 (2007) · Published version
arxiv created 2007/09/19 · openalex publication_date 2007/09/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the interplay of crystal field splitting and Hund coupling in a two-orbital model which captures the essential physics of systems with two electrons or holes in the e(g) shell. We use single site dynamical mean field theory with a recently developed impurity solver, which is able to access strong couplings and low temperatures. The fillings of the orbitals and the location of phase boundaries are computed as a function of Coulomb repulsion, exchange coupling, and crystal field splitting. We find that the Hund coupling can drive the system into a novel Mott insulating phase with vanishing orbital susceptibility. Away from half-filling, the crystal field splitting can induce an orbital selective Mott state.