Dimensionality-Driven Electronic and Orbital Transitions Mediating Interfacial Magnetism in LaNiO3/CaMnO3 Observed In Situ
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866911636771569664 |
|---|---|
| author | Courchene, B-A. Hampel, A. Beck, S. Paudel, J. R. Grassi, J. D. Lapinski, L. A. Derrico, A. M. Terilli, M. Kareev, M. Klewe, C. Gloskovskii, A. Schlueter, C. Chaluvadi, S. K. Mazzola, F. Vobornik, I. Orgiani, P. Chakhalian, J. Millis, A. J. Gray, A. X. |
| author_facet | Courchene, B-A. Hampel, A. Beck, S. Paudel, J. R. Grassi, J. D. Lapinski, L. A. Derrico, A. M. Terilli, M. Kareev, M. Klewe, C. Gloskovskii, A. Schlueter, C. Chaluvadi, S. K. Mazzola, F. Vobornik, I. Orgiani, P. Chakhalian, J. Millis, A. J. Gray, A. X. |
| contents | Emergent magnetic states at oxide interfaces arise from the interplay of charge transfer, orbital reconstruction, and dimensional confinement, offering a route to engineered correlated-electron behavior in nanoscale spintronic materials. Here, we combine in situ synthesis, polarization-dependent angle-resolved photoelectron spectroscopy, X-ray magnetic circular dichroism, and first-principles electronic-structure calculations to investigate LaNiO3/CaMnO3 superlattices. We show that reducing the LaNiO3 thickness drives a metal-insulator transition accompanied by loss of electronic coherence and an orbital-polarization crossover in the ultrathin limit. These changes weaken charge transfer across the interface and suppress the interfacial Mn magnetic moment in CaMnO3, revealing that the emergent ferromagnetic state is directly governed by electronic confinement in LaNiO3. The insulating state and orbital reconstruction are reproduced by density functional theory combined with dynamical mean-field theory. Together, these results establish a direct and tunable coupling among electronic, orbital, and magnetic degrees of freedom in oxide heterostructures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_28054 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Dimensionality-Driven Electronic and Orbital Transitions Mediating Interfacial Magnetism in LaNiO3/CaMnO3 Observed In Situ Courchene, B-A. Hampel, A. Beck, S. Paudel, J. R. Grassi, J. D. Lapinski, L. A. Derrico, A. M. Terilli, M. Kareev, M. Klewe, C. Gloskovskii, A. Schlueter, C. Chaluvadi, S. K. Mazzola, F. Vobornik, I. Orgiani, P. Chakhalian, J. Millis, A. J. Gray, A. X. Strongly Correlated Electrons Materials Science Emergent magnetic states at oxide interfaces arise from the interplay of charge transfer, orbital reconstruction, and dimensional confinement, offering a route to engineered correlated-electron behavior in nanoscale spintronic materials. Here, we combine in situ synthesis, polarization-dependent angle-resolved photoelectron spectroscopy, X-ray magnetic circular dichroism, and first-principles electronic-structure calculations to investigate LaNiO3/CaMnO3 superlattices. We show that reducing the LaNiO3 thickness drives a metal-insulator transition accompanied by loss of electronic coherence and an orbital-polarization crossover in the ultrathin limit. These changes weaken charge transfer across the interface and suppress the interfacial Mn magnetic moment in CaMnO3, revealing that the emergent ferromagnetic state is directly governed by electronic confinement in LaNiO3. The insulating state and orbital reconstruction are reproduced by density functional theory combined with dynamical mean-field theory. Together, these results establish a direct and tunable coupling among electronic, orbital, and magnetic degrees of freedom in oxide heterostructures. |
| title | Dimensionality-Driven Electronic and Orbital Transitions Mediating Interfacial Magnetism in LaNiO3/CaMnO3 Observed In Situ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2604.28054 |