Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface
DOKPE
- Sarkar, Subhrangsu ORCID University of Fribourg
- Capu, Roxana ORCID West University of Timisoara, Romania
- Pashkevich, Yurii ORCID University of Fribourg
- Knobel, Jonas ORCID University of Fribourg
- dos Reis Cantarino, Marli ORCID European Synchrotron Radiation Facility, Grenoble, France
- Nag, Abhishek ORCID Harwell Campus, Oxfordshire, UK
- Kummer, Kurt ORCID European Synchrotron Radiation Facility, Grenoble, France
- Betto, Davide European Synchrotron Radiation Facility, Grenoble, France
- Sant, Roberto European Synchrotron Radiation Facility, Grenoble, France
- Nicholson, Christopher W. ORCID University of Fribourg
- Khmaladze, Jarji University of Fribourg
- Zhou, Ke-Jin ORCID Harwell Campus, Oxfordshire, UK
- Brookes, Nicholas B. ORCID European Synchrotron Radiation Facility, Grenoble, France
- Monney, Claude ORCID University of Fribourg
- Bernhard, Christian ORCID University of Fribourg
- 2024
Published in:
- PNAS Nexus. - Oxford, UK : Oxford University Press. - 2024, vol. 3, no. 4, p. 1-11
English
Heterostructures from complex oxides allow one to combine various electronic and magnetic orders as to induce new quantum states. A prominent example is the coupling between superconducting and magnetic orders in multilayers from high-Tc cuprates and manganites. A key role is played here by the interfacial CuO2 layer whose distinct properties remain to be fully understood. Here, we study with resonant inelastic X-ray scattering the magnon excitations of this interfacial CuO2 layer. In particular, we show that the underlying antiferromagnetic exchange interaction at the interface is strongly suppressed to J ≈ 70 meV, when compared with J ≈ 130 meV for the CuO2 layers away from the interface. Moreover, we observe an anomalous momentum dependence of the intensity of the interfacial magnon mode and show that it suggests that the antiferromagnetic order is accompanied by a particular kind of orbital order that yields a so-called altermagnetic state. Such a 2D altermagnet has recently been predicted to enable new spintronic applications and superconducting proximity effects.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
-
- English
- Classification
- Physics
- License
- CC BY
- Open access status
- gold
- Identifiers
-
- DOI 10.1093/pnasnexus/pgae100
- ISSN 2752-6542
- Persistent URL
- https://folia.unifr.ch/unifr/documents/328458
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