Tuning orbital-selective phase transitions in a two-dimensional Hund's correlated system.

ABSTRACT: Hund's rule coupling (J) has attracted much attention recently for its role in the description of the novel quantum phases of multi-orbital materials. Depending on the orbital occupancy, J can lead to various intriguing phases. However, experimental confirmation of the orbital occupancy dependency has been difficult as controlling the orbital degrees of freedom normally accompanies chemical inhomogeneities. Here, we demonstrate a method to investigate the role of orbital occupancy in J related phenomena without inducing inhomogeneities. By growing SrRuO₃ monolayers on various substrates with symmetry-preserving interlayers, we gradually tune the crystal field splitting and thus the orbital degeneracy of the Ru t_2g orbitals. It effectively varies the orbital occupancie

SUBMITTER: Ko EK 

PROVIDER: S-EPMC10275918 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature