Ferromagnetic kinetic exchange interaction in magnetic insulators
| Autor: | Dan Liu, Veacheslav Vieru, Zhishuo Huang, Akseli Mansikkamäki, Liviu F. Chibotaru, Naoya Iwahara |
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| Přispěvatelé: | RS: FSE MSP, Maastricht Science Programme |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Work (thermodynamics)
magneettiset ominaisuudet Materials science electronic-structure Physics Multidisciplinary FOS: Physical sciences magnetic coupling elektronit magneettikentät Kinetic energy teoriat ORBITAL PHYSICS Condensed Matter - Strongly Correlated Electrons Condensed Matter::Materials Science ANTIFERROMAGNETISM HUBBARD-MODEL Physics - Chemical Physics SUPEREXCHANGE INTERACTIONS density functional theory Chemical Physics (physics.chem-ph) Condensed Matter - Materials Science complexes Science & Technology Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics CRYSTAL magnetic insulators Physics SUPERCONDUCTIVITY Exchange interaction Materials Science (cond-mat.mtrl-sci) transition ORDER hubbard-model superexchange interactions Wannier function methods ELECTRONIC-STRUCTURE Ferromagnetism Physical Sciences Condensed Matter::Strongly Correlated Electrons COMPLEXES TRANSITION |
| Zdroj: | Physical Review Research, 2(3):033430. American Physical Society |
| ISSN: | 2643-1564 |
| Popis: | The superexchange theory predicts dominant antiferromagnetic kinetic interaction when the orbitals accommodating magnetic electrons are covalently bonded through diamagnetic bridging atoms/groups. Here we show that explicit consideration of magnetic and (leading) bridging orbitals, together with the electron transfer between the former, reveals a strong ferromagnetic kinetic exchange contribution. First principle calculations show that it is comparable in strength with antiferromagnetic superexchange in a number of magnetic materials with diamagnetic metal bridges. In particular, it is responsible for a very large ferromagnetic coupling ($-10$ meV) between the iron ions in a Fe$^{3+}$-Co$^{3+}$-Fe$^{3+}$ complex. Comment: Main text: 13 pages, 8 figures |
| Databáze: | OpenAIRE |
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