Anomalous Ferromagnetism of quasiparticle doped holes in cuprate heterostructures revealed using resonant soft X-ray magnetic scattering.

Autor: Ong BL; Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore.; Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, 117603, Singapore., Jayaraman K; Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore.; Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, 117603, Singapore., Diao C; Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, 117603, Singapore., Whitcher TJ; Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore.; Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, 117603, Singapore., Jain A; Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore.; Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, 117603, Singapore., Hung H; Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore., Breese MBH; Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore.; Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, 117603, Singapore., Tok ES; Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore., Rusydi A; Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore. andrivo.rusydi@nus.edu.sg.; Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, 117603, Singapore. andrivo.rusydi@nus.edu.sg.; Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore. andrivo.rusydi@nus.edu.sg.; NUS Graduate School for Integrative Sciences and Engineering, Singapore, 117456, Singapore. andrivo.rusydi@nus.edu.sg.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Aug 08; Vol. 13 (1), pp. 4639. Date of Electronic Publication: 2022 Aug 08.
DOI: 10.1038/s41467-022-31885-1
Abstrakt: We report strong ferromagnetism of quasiparticle doped holes both within the ab-plane and along the c-axis of Cu-O planes in low-dimensional Au/d-La 1.8 Ba 0.2 CuO 4 /LaAlO 3 (001) heterostructures (d = 4, 8 and 12 unit-cells) using resonant soft X-ray and magnetic scattering together with X-ray magnetic circular dichroism. Interestingly, ferromagnetism is stronger at a hole doped peak and at an upper Hubbard band of O with spin-polarization degree as high as 40%, revealing strong ferromagnetism of Mottness. For in-ab-plane spin-polarizations, the spin of doped holes in O2p-Cu3d-O2p is a triplet state yielding strong ferromagnetism. For out-of-ab-plane spin-polarization, while the spins of doped holes in both O2p-O2p and Cu3d-Cu3d are triplet states, the spin of doped holes in Cu3d-O2p is a singlet state yielding ferrimagnetism. A ferromagnetic-(002) Bragg-peak of the doped holes is observed and enhanced as a function of d revealing strong ferromagnetism coupling between Cu-O layers along the c-axis.
(© 2022. The Author(s).)
Databáze: MEDLINE
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