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DOE OSTI · 2566974

Electronic reconstruction in confined SrRuO 3 monolayers

Lamichhane, U. [Oklahoma State Univ., Stillwater, OK (United States)] (ORCID:000000019427232X)·Sankhi, B. [Oklahoma State Univ., Stillwater, OK (United States)]·Kundu, N. [Oklahoma State Univ., Stillwater, OK (United States)] (ORCID:000000027397459X)·Fabbris, G. [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000182784985)·Choi, Y. [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000157903129)·Haskel, D. [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000255325908)·McChesney, J. L. [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000304702088)·Cao, Yue [Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:000000023989158X)·Li, J. [Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)] (ORCID:0009000457025193)·Bisogni, V. [Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)] (ORCID:0000000273999930)·Borunda, M. F. [Oklahoma State Univ., Stillwater, OK (United States)] (ORCID:0000000150372679)·Meyers, D. [Oklahoma State Univ., Stillwater, OK (United States)] (ORCID:0000000341645131)
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Abstract

Here, we report the observation of an electronic reconstruction in dimensionally controlled ruthenate heterostructures synthesized by pulsed laser deposition. High structural and electronic quality of superlattices comprised of a single SrRuO 3 layer inter-spaced with varying thicknesses of insulating SrTiO 3 layers was verified by reflection high energy electron diffraction, atomic force microscopy, x-ray diffraction, reciprocal space mapping, and x-ray absorption spectroscopy. X-ray absorption spectroscopy evidences a confinement-driven evolution of the Ru electronic configuration from the 𝑑 5 $\underline{L}$ to the 𝑑 4 state. Significant increases of the spin-orbit coupling are observed in connection with the configuration changes supporting recent works identifying large enhancement of the magnetic anisotropy. The growth of high quality two-dimensional confined ruthenate layers under precisely controlled environments highlights the potential to directly manipulate interlayer coupling and selectively perturb the electronic state in ruthenates in analogy to superconducting Sr 2 ⁢RuO 4 .

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36 MATERIALS SCIENCEElectronic structurePhotoemission spectroscopySpin-orbit couplingX-ray absorption spectroscopyX-ray techniques

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Lamichhane, U. [Oklahoma State Univ., Stillwater, OK (United States)] (ORCID:000000019427232X), Sankhi, B. [Oklahoma State Univ., Stillwater, OK (United States)], Kundu, N. [Oklahoma State Univ., Stillwater, OK (United States)] (ORCID:000000027397459X), Fabbris, G. [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000182784985), Choi, Y. [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000157903129), Haskel, D. [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000255325908), McChesney, J. L. [Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)] (ORCID:0000000304702088), Cao, Yue [Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:000000023989158X), Li, J. [Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)] (ORCID:0009000457025193), Bisogni, V. [Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)] (ORCID:0000000273999930), Borunda, M. F. [Oklahoma State Univ., Stillwater, OK (United States)] (ORCID:0000000150372679), Meyers, D. [Oklahoma State Univ., Stillwater, OK (United States)] (ORCID:0000000341645131). 2024-12-02. Electronic reconstruction in confined SrRuO 3 monolayers. https://doi.org/10.1103/physrevb.110.235104

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36 MATERIALS SCIENCE↗