Boson Slave Solver (BoSS) v1.1
Alexandru B. Georgescu, Minjung Kim, Sohrab Ismail-Beigi

TL;DR
BoSS v1.1 is a software tool that efficiently models strongly correlated electron systems using the slave-boson method, applicable to extended Hubbard models including p-d interactions, with practical examples and integration with electronic structure codes.
Contribution
This work introduces BoSS v1.1, a new software implementation of the slave-boson method for extended Hubbard models, enabling accurate modeling of complex correlated materials.
Findings
Demonstrated band renormalization in SrVO3
Analyzed Ni 3d multiplet structures in LaNiO3
Explored magnetic moments and insulating behavior in SmNiO3
Abstract
Accurate and computationally efficient modeling of systems of interacting electrons is an outstanding problem in theoretical and computational materials science. For materials where strong electronic interactions are primarily of a localized character and act within a subspace of localized quantum states on separate atomic sites (e.g., in transition metal and rare-earth compounds), their electronic behaviors are typically described by the Hubbard model and its extensions. In this work, we describe BoSS (Boson Slave Solver), a software implementation of the slave-boson method appropriate for describing a variety of extended Hubbard models, namely models that include both the interacting atomic sites ("" states) and non-interacting or ligand sites ("" states). We provide a theoretical background, a description of the equations solved by BoSS, an overview of the algorithms…
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