Electronically driven spin-reorientation transition of the correlated polar metal Ca3Ru2O7
(2020) In Proceedings of the National Academy of Sciences of the United States of America 117(27). p.15524-15529- 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... (More)
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.
(Less)
- author
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Angle-resolved photoemission, Correlated oxide, Magnetism, Rashba spin-orbit, Ruthenate
- in
- Proceedings of the National Academy of Sciences of the United States of America
- volume
- 117
- issue
- 27
- pages
- 6 pages
- publisher
- National Academy of Sciences
- external identifiers
-
- scopus:85088087025
- pmid:32576687
- ISSN
- 0027-8424
- DOI
- 10.1073/pnas.2003671117
- language
- English
- LU publication?
- yes
- id
- bda3e443-5733-4277-aab0-a0fdfb898eb2
- date added to LUP
- 2020-07-29 11:02:18
- date last changed
- 2024-05-15 15:33:50
@article{bda3e443-5733-4277-aab0-a0fdfb898eb2,
abstract = {{<p>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 Ca<sub>3</sub>Ru<sub>2</sub>O<sub>7</sub>, 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.</p>}},
author = {{Marković, Igor and Watson, Matthew D. and Clark, Oliver J. and Mazzola, Federico and Morales, Edgar Abarca and Hooley, Chris A. and Rosner, Helge and Polley, Craig M. and Balasubramanian, Thiagarajan and Mukherjee, Saumya and Kikugawa, Naoki and Sokolov, Dmitry A. and Mackenzie, Andrew P. and King, Phil D.C.}},
issn = {{0027-8424}},
keywords = {{Angle-resolved photoemission; Correlated oxide; Magnetism; Rashba spin-orbit; Ruthenate}},
language = {{eng}},
number = {{27}},
pages = {{15524--15529}},
publisher = {{National Academy of Sciences}},
series = {{Proceedings of the National Academy of Sciences of the United States of America}},
title = {{Electronically driven spin-reorientation transition of the correlated polar metal Ca<sub>3</sub>Ru<sub>2</sub>O<sub>7</sub>}},
url = {{http://dx.doi.org/10.1073/pnas.2003671117}},
doi = {{10.1073/pnas.2003671117}},
volume = {{117}},
year = {{2020}},
}