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  Electronically driven spin-reorientation transition of the correlated polar metal Ca3Ru2O7

Marković, I., Watson, M. D., Clark, O. J., Mazzola, F., Abarca Morales, E., Hooley, C. A., et al. (2020). Electronically driven spin-reorientation transition of the correlated polar metal Ca3Ru2O7. Proceedings of the National Academy of Sciences of the United States of America, 117(27), 15524-15529. doi:10.1073/pnas.2003671117.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-C7AA-A Version Permalink: http://hdl.handle.net/21.11116/0000-0006-C7AD-7
Genre: Journal Article

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 Creators:
Marković, Igor1, Author              
Watson, Matthew D.2, Author
Clark, Oliver J.2, Author
Mazzola, Federico2, Author
Abarca Morales, Edgar1, Author              
Hooley, Chris A.2, Author
Rosner, Helge1, Author              
Polley, Craig M.2, Author
Balasubramanian, Thiagarajan2, Author
Mukherjee, Saumya2, Author
Kikugawa, Naoki2, Author
Sokolov, Dmitry A.1, Author              
Mackenzie, Andrew P.3, Author              
King, Phil D. C.2, Author
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2External Organizations, ou_persistent22              
3Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              

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Free keywords: Angle-resolved photoemission, Correlated oxide, Magnetism, Rashba spin-orbit, Ruthenate
 Abstract: The interplay between spin-orbit coupling and structural inversion symmetry breaking in solids has generated much interest due to the nontrivial spin and magnetic textures which can result. Such studies are typically focused on systems where large atomic number elements lead to strong spin-orbit coupling, in turn rendering electronic correlations weak. In contrast, here we investigate the temperature-dependent electronic structure of Ca3Ru2O7, a 4d oxide metal for which both correlations and spin-orbit coupling are pronounced and in which octahedral tilts and rotations combine to mediate both global and local inversion symmetry-breaking polar distortions. Our angle-resolved photoemission measurements reveal the destruction of a large hole-like Fermi surface upon cooling through a coupled structural and spinreorientation transition at 48 K, accompanied by a sudden onset of quasiparticle coherence. We demonstrate how these result from band hybridization mediated by a hidden Rashba-type spin- orbit coupling. This is enabled by the bulk structural distortions and unlocked when the spin reorients perpendicular to the local symmetry-breaking potential at the Ru sites. We argue that the electronic energy gain associated with the band hybridization is actually the key driver for the phase transition, reflecting a delicate interplay between spin-orbit coupling and strong electronic correlations and revealing a route to control magnetic ordering in solids. © 2020 National Academy of Sciences. All rights reserved.

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Language(s): eng - English
 Dates: 2020-06-232020-06-23
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1073/pnas.2003671117
 Degree: -

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Title: Proceedings of the National Academy of Sciences of the United States of America
  Other : Proc. Acad. Sci. USA
  Other : Proc. Acad. Sci. U.S.A.
  Other : Proceedings of the National Academy of Sciences of the USA
  Abbreviation : PNAS
Source Genre: Journal
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Publ. Info: Washington, D.C. : National Academy of Sciences
Pages: - Volume / Issue: 117 (27) Sequence Number: - Start / End Page: 15524 - 15529 Identifier: ISSN: 0027-8424
CoNE: https://pure.mpg.de/cone/journals/resource/954925427230