Skip to Main content Skip to Navigation
Theses

Multi-Orbital Physics in Materials with Strong Electronic Correlations : Hund's Coupling and Inter-Shell Interactions

Abstract : The physics of correlated materials offers a wealth of new phenomena, many of which are not yet - or only partially - understood. In this thesis, we focus on multi-orbital models, which we study using various methods, including dynamical mean-field theory. We show that in the multi-orbital Hubbard model close to the Mott transition, Hund's coupling gives rise to a bad metal regime the properties of which we analyze. Furthermore, we consider a more general class of models that include oxygen ligands. More specifically, we study the effect of inter-shell interactions between correlated metal- and ligand p-orbitals. In this context, we develop and test a new slave-rotor approach to treat such interactions in an effective manner. The final chapter constitutes an excursion to the field of molecular spintronics, where we study the physics of the hybridization-induced spin-state switching in organometallic nickel porphyrin molecules.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-02435008
Contributor : Abes Star :  Contact
Submitted on : Friday, January 10, 2020 - 2:53:09 PM
Last modification on : Wednesday, February 5, 2020 - 8:06:06 AM

File

84988_STEINBAUER_2019_archivag...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02435008, version 1

Collections

Citation

Jakob Steinbauer. Multi-Orbital Physics in Materials with Strong Electronic Correlations : Hund's Coupling and Inter-Shell Interactions. Strongly Correlated Electrons [cond-mat.str-el]. Université Paris-Saclay, 2019. English. ⟨NNT : 2019SACLX068⟩. ⟨tel-02435008⟩

Share

Metrics

Record views

120

Files downloads

42