Topological phases driven by orbital entanglement in Transition Metal Oxide Perovskite interfaces
The deceptively simple crystallographic structure of early transition metal oxide perovskites belies the complexity and variety of electronic, magnetic and structural phases that they display. Structural defects, rotations, tilts, deformations of the oxygen-transition metal element octahedra help ex...
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Académie des sciences
2024-09-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.190/ |
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| author | Gabay, Marc |
| author_facet | Gabay, Marc |
| author_sort | Gabay, Marc |
| collection | DOAJ |
| description | The deceptively simple crystallographic structure of early transition metal oxide perovskites belies the complexity and variety of electronic, magnetic and structural phases that they display. Structural defects, rotations, tilts, deformations of the oxygen-transition metal element octahedra help explain many of these phenomena. Another key player is the orbital degree of freedom of the d-ion. It may lead to a quantum entanglement of the materials electronic wavefunctions which promotes topological states in low dimensional geometries. In this report we present a study of select topological properties at surfaces or heterostructure interfaces of a subset of these perovskites when the orientation of the structure is along the (001) or (111) direction. In contrast to the extensively studied classes of topological insulators, topology in these systems is a characteristic property of the conducting regime, thus endowing the compounds with potential spintronic and quantum computing functionalities. We conclude this communication with a personal tribute to Gérard Toulouse (in French). |
| format | Article |
| id | doaj-art-aea2bf8365794ca59379c14e983bf3d4 |
| institution | Kabale University |
| issn | 1878-1535 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj-art-aea2bf8365794ca59379c14e983bf3d42025-02-07T13:53:46ZengAcadémie des sciencesComptes Rendus. Physique1878-15352024-09-0125G130332710.5802/crphys.19010.5802/crphys.190Topological phases driven by orbital entanglement in Transition Metal Oxide Perovskite interfacesGabay, Marc0Laboratoire de Physique des Solides, Université Paris Saclay, CNRS UMR 8502, F-91405 Orsay Cedex, FranceThe deceptively simple crystallographic structure of early transition metal oxide perovskites belies the complexity and variety of electronic, magnetic and structural phases that they display. Structural defects, rotations, tilts, deformations of the oxygen-transition metal element octahedra help explain many of these phenomena. Another key player is the orbital degree of freedom of the d-ion. It may lead to a quantum entanglement of the materials electronic wavefunctions which promotes topological states in low dimensional geometries. In this report we present a study of select topological properties at surfaces or heterostructure interfaces of a subset of these perovskites when the orientation of the structure is along the (001) or (111) direction. In contrast to the extensively studied classes of topological insulators, topology in these systems is a characteristic property of the conducting regime, thus endowing the compounds with potential spintronic and quantum computing functionalities. We conclude this communication with a personal tribute to Gérard Toulouse (in French).https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.190/Materials ScienceTheoryPerovskitesInterfacesTopologySpintronic |
| spellingShingle | Gabay, Marc Topological phases driven by orbital entanglement in Transition Metal Oxide Perovskite interfaces Comptes Rendus. Physique Materials Science Theory Perovskites Interfaces Topology Spintronic |
| title | Topological phases driven by orbital entanglement in Transition Metal Oxide Perovskite interfaces |
| title_full | Topological phases driven by orbital entanglement in Transition Metal Oxide Perovskite interfaces |
| title_fullStr | Topological phases driven by orbital entanglement in Transition Metal Oxide Perovskite interfaces |
| title_full_unstemmed | Topological phases driven by orbital entanglement in Transition Metal Oxide Perovskite interfaces |
| title_short | Topological phases driven by orbital entanglement in Transition Metal Oxide Perovskite interfaces |
| title_sort | topological phases driven by orbital entanglement in transition metal oxide perovskite interfaces |
| topic | Materials Science Theory Perovskites Interfaces Topology Spintronic |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.190/ |
| work_keys_str_mv | AT gabaymarc topologicalphasesdrivenbyorbitalentanglementintransitionmetaloxideperovskiteinterfaces |