Journal article

+ 1 other files

Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface

DOKPE

Show more…
  • 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
Persistent URL
https://folia.unifr.ch/unifr/documents/328458
Other files

Statistics

Document views: 7 File downloads:
  • sarkarpnasnexus3pgae1002024_0.pdf: 9
  • pgae100_supplementary_data.pdf: 7