2021/01/31 by Victor Drouin-Touchette, Elio J. König, Yashar Komijani +1 · 1 citation
Materials Science · Physics and Astronomy · #Condensed matter physics #Impurity #Organic and Molecular Conductors Research #Physics #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.103.205147
published as Phys. Rev. B 103, 205147 (2021) · 15 pages, 11 figures
arxiv created 2021/02/01 · openalex publication_date 2021/05/26 · arxiv updated 2021/05/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Motivated by the relevance of Hund's coupling in the context of multiorbital superconductors, we revisit the problem of a multiorbital Kondo impurity with Hund's interaction. Using dynamical large-N techniques, we propose an efficient approach that retains the essential physics at play, while providing a pathway to scalable quantum impurity solvers. We are able to follow the ground state, dynamic, and thermodynamic properties of this system over many decades of temperature. Our approach captures the emergence of large moments and follows the stretched evolution of the physics down to their exponentially suppressed Kondo temperature. We focus our analysis on the intermediate finite temperature phase which presents an alternate paramagnetic state due to the emergent moment and discuss the relevance of this regime to Hund's metals.