BoSS: Boson Slave Solver software for correlated electrons

We describe the recent release of the new open source software "BoSS" or Boson Slave Solver (bitbucket.org/yalebosscode/boss), written in MATLAB, which solves extended Hubbard models using the slave boson approach. The primary intended application is to study the electronic structure of transition metal oxides which are often affected significantly by strong and localized electron-electron interactions. Examples include renormalization of the mass and spectral weight of low energy quasiparticles and the formation of Hubbard bands: these dynamical effects can not be described by band theory approaches (e.g., DFT, DFT+U or hybrid methods). Slave-boson approaches represent computationally efficient electronic structure methods that can explicitly include such effects. We present an overview of our recent slave boson methodology [1,2], show applications to some transition metal oxides where we can compare to experimental and dynamical mean field theory (DMFT) results.
[1] Georgescu and Ismail-Beigi, PRB 92, 235117 (2015)
[2] Georgescu and Ismail-Beigi, PRB 96, 165135 (2017)