Quantum magnetic properties and metal‐to‐insulator transition in chemically 
doped calcium ruthenate perovskite

Singh, Deepak K.; Ernst, Arthur; Dugaev, Vitalii; Chen, Yiyao; Gunasekera, Jagath

doi:10.1002/pssb.202100503

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Quantum magnetic properties and metal‐to‐insulator transition in chemically doped calcium ruthenate perovskite

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Ernst, Arthur
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1002/pssb.202100503
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Citation

Singh, D. K., Ernst, A., Dugaev, V., Chen, Y., & Gunasekera, J. (2022). Quantum magnetic properties and metal‐to‐insulator transition in chemically doped calcium ruthenate perovskite. Physica Status Solidi B, 259(4): 2100503. doi:10.1002/pssb.202100503.

Cite as: https://hdl.handle.net/21.11116/0000-000A-0D7E-C

Abstract

Ruthenates provide a comprehensive platform to study a plethora of novel properties, such as quantum magnetism, superconductivity, and magnetic fluctuation mediated metal–insulator transition (MIT). Herein, an overview of quantum mechanical phenomenology in calcium ruthenium oxide with varying compositions is provided. While the stoichiometric composition of CaRuO₃ exhibits non-fermi liquid (FL) behavior with quasi-criticality, chemically doped compounds depict prominent signatures of quantum magnetic fluctuations at low temperature that in some cases are argued to mediate in metal–insulator transition. In the case of cobalt-doped CaRuO₃, an unusual continuum fluctuation is found to persist deep inside the glassy phase of the material. These observations reflect the richness of the ruthenate research platform in the study of quantum magnetic phenomena of fundamental importance.