Role of symmetry mismatch, charge transfer and low dimensionality in the magnetic order of CaMnO3/SrTiO3 ultrathin heterostructures
Source abstract
Abstract
By means of ab initio calculations, we study the effect of charge transfer and symmetry mismatch on the magnetic and electronic properties of CaMnO3 ultrathin films, epitaxially grown on SrTiO3 (001). We find that the interplay of these degrees of freedom, together with the low dimensionality and the strain imposed by the substrate, changes the bulk occupancy of the Mn eg orbitals, which determines the magnetic configuration of the ultrathin CMO films. A transition from an insulating G-type to a metallic A-type antiferromagnetic configuration is stabilized.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Instituto de Nanociencia y Nanotecnología (INN CNEA-CONICET) , 1650 San Martín, Argentina and , Avenida General Paz 1499, 1650 San Martín, Pcia. de Buenos Aires, Argentina
Departamento de Física de la Materia Condensada, GIyA-CNEA , 1650 San Martín, Argentina and , Avenida General Paz 1499, 1650 San Martín, Pcia. de Buenos Aires, Argentina
Funding
Fondo Argentino Sectorial · H2020 Marie Skłodowska-Curie Actions
References (29)
Show source-provided references
1. Nature · 2004 · 427 · 42310.1038/nature02308 ↗
2. Magnetic effects at the interface between non-magnetic oxides10.1038/nmat1931 ↗
3. Nature Materials · 2016 · 15 · 42510.1038/nmat4579 ↗
4. Nano Letters · 2019 · 19 · 418810.1021/acs.nanolett.9b01772 ↗
5. Symmetry and lattice mismatch induced strain accommodation near and away from correlated perovskite interfaces10.1063/1.4896969 ↗
6. Interaction between the d-shells in the transition metals. II. Ferromagnetic compounds of manganese with perovskite structure10.1103/physrev.82.403 ↗
7. Effects of double exchange in magnetic crystals10.1103/physrev.118.141 ↗
8. Theory of the role of covalence in the perovskite-type manganites [La, m(II)]MnO310.1103/physrev.100.564 ↗
9. Strain-induced magnetic transition in CaMnO3 ultrathin films10.1103/physrevb.102.085432 ↗
10. Inhomogeneous magnetism in la-doped CaMnO3. i. mesoscopic phase separation due to lattice-coupled ferromagnetic interactions10.1103/physrevb.68.134439 ↗
11. Evolution of the magnetic ground state in the electron-doped antiferromagnet CaMnO310.1103/physrevb.68.014403 ↗
12. Structural, electronic and thermoelectric behaviour of CaMnO3 and CaMnO3−δ10.1039/c4ta01514b ↗
13. Phys. Rew. B · 2002 · 65 · 17440210.1103/physrevb.65.174402 ↗
14. Appl. Phys. Lett. · 1995 · 67 · 55710.1063/1.115168 ↗
15. Adv. Funct. Mater · 2007 · 17 · 391810.1002/adfm.200700137 ↗
16. Phys. Rev. B · 1994 · 50 · 1795310.1103/physrevb.50.17953 ↗
17. Phys. Rev. B · 1996 · 54 · 1116910.1103/physrevb.54.11169 ↗
18. Phys. Rev. B · 1999 · 59 · 175810.1103/physrevb.59.1758 ↗
19. Phys. Rev. Lett. · 1980 · 45 · 56610.1103/physrevlett.45.566 ↗
20. Phys. Rev. B · 1981 · 23 · 504810.1103/physrevb.23.5048 ↗
21. Phys. Rev. Lett. · 1999 · 83 · 418410.1103/physrevlett.83.4184 ↗
22. Phys. Rev. B · 2000 · 62 · 1157110.1103/physrevb.62.11571 ↗
23. Phys. Rev. B · 2017 · 95 · 11512010.1103/physrevb.95.115120 ↗
24. Density-functional theory and strong interactions: Orbital ordering in mott-hubbard insulators10.1103/physrevb.52.r5467 ↗
25. Electronic properties of LaAlO3/SrTiO3 n-type interfaces: A GGA u study10.1088/1361-648X/aa57ac ↗
26. Induced magnetoelectric response in Pnma perovskites10.1103/physrevlett.107.197603 ↗
27. Nature Phys. · 2019 · 15 · 6710.1038/s41567-018-0307-5 ↗
28. Appl. Phys. Lett. · 2016 · 108 · 08290210.1063/1.4942374 ↗
29. Bulk electronic structure of SrTiO3: Experiment and theory10.1063/1.1415766 ↗