Work

Orbital Selectivity from Orbital Ordering in a van Hove Singularity Hubbard Model

Year: 2026

Type: article

Abstract: We explore the electronic state of a van Hove singularity two-orbital model, showing the emergence of orbital selectivity arising from ferro-orbital ordering (FOO). Our microscopic description highlights the role of orbital degrees of freedom in realizing orbital selectivity with coexistent quasiparticle resonances and Mott-localized electronic states. This allows us to identify the emergent paramagnetic electronic state that gives rise to spontaneous formation of altermagnetism from electron interactions and orbital ordering. We also show why our DMFT results might be important for understanding the implications of FOO for memristors for future neuromorphics.

Source: Semiconductors and Heterogeneous Integration

DOI: 10.3390/shi1010004

Author: Luis Craco

Institutions: Leibniz Institute for Solid State and Materials Research, Universidade Federal de Mato Grosso

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Conselho Nacional de Desenvolvimento Científico e Tecnológico, Financiadora de Estudos e Projetos

Awards: G2322936126, G3688472698