Increased Crystal Field Drives Intermediate Coupling and Minimizes Decoherence in Tetravalent Praseodymium Qubits.

ABSTRACT: Crystal field (CF) control of rare-earth (RE) ions has been employed to minimize decoherence in qubits and to enhance the effective barrier of single-molecule magnets. The CF approach has been focused on the effects of symmetry on dynamic magnetic properties. Herein, the magnitude of the CF is increased via control of the RE oxidation state. The enhanced 4f metal-ligand covalency in Pr⁴⁺ gives rise to CF energy scales that compete with the spin-orbit coupling of Pr⁴⁺ and thereby shifts the paradigm from the ionic ζ_SOC ≫ V_CF limit, used to describe trivalent RE-ion, to an intermediate coupling (IC) regime. We examine Pr⁴⁺-doped perovskite oxide lattices (BaSnO₃ and BaZrO₃). These systems are defined by IC wh

SUBMITTER: Ramanathan A 

PROVIDER: S-EPMC10436280 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature