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Emergent half-metal...
Emergent half-metal with mixed structural order in (111)-oriented (LaMnO3)2n|(SrMnO3)n superlattices
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- Cossu, Fabrizio (författare)
- Kangwon Natl Univ, Dept Phys, Chunchon 24341, South Korea.;Kangwon Natl Univ, Inst Quantum Convergence & Technol, Chunchon 24341, South Korea.;Univ York, Sch Phys Engn & Technol, York YO10 5DD, England.
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- Do Nascimento, Julio Alves (författare)
- Kangwon Natl Univ, Inst Quantum Convergence & Technol, Chunchon 24341, South Korea.
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- Cavill, Stuart A. (författare)
- Univ York, Sch Phys Engn & Technol, York YO10 5DD, England.
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- Di Marco, Igor (författare)
- Uppsala universitet,Materialteori,Nicolaus Copernicus Univ, Fac Phys Astron & Informat, Inst Phys, Grudziadzka 5, PL-87100 Grudziadzka, Poland.
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- Lazarov, Vlado K. (författare)
- Univ York, Sch Phys Engn & Technol, York YO10 5DD, England.
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- Kim, Heung-Sik (författare)
- Kangwon Natl Univ, Dept Phys, Chunchon 24341, South Korea.;Kangwon Natl Univ, Inst Quantum Convergence & Technol, Chunchon 24341, South Korea.
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Kangwon Natl Univ, Dept Phys, Chunchon 24341, South Korea;Kangwon Natl Univ, Inst Quantum Convergence & Technol, Chunchon 24341, South Korea.;Univ York, Sch Phys Engn & Technol, York YO10 5DD, England. Kangwon Natl Univ, Inst Quantum Convergence & Technol, Chunchon 24341, South Korea. (creator_code:org_t)
- American Physical Society, 2024
- 2024
- Engelska.
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Ingår i: Physical Review B. - : American Physical Society. - 2469-9950 .- 2469-9969. ; 109:4
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Using first-principles techniques, we study the structural, magnetic, and electronic properties of (111)-oriented (LaMnO3)2n |(SrMnO3)n superlattices of varying thickness (n = 2, 4, 6). We find that the properties of the thinnest superlattice (n = 2) are similar to the celebrated half-metallic ferromagnetic alloy La2/3Sr1/3MnO3, with quenched Jahn-Teller distortions. At intermediate thickness (n = 4), the a-a-a- tilting pattern transitions to the a-a-c+ tilting pattern, driven by the lattice degrees of freedom in the LaMnO3 region. The emergence of the Jahn-Teller modes and the spatial extent needed for their development play a key role in this structural transition. For the largest thickness considered (n = 6), we unveil an emergent separation of Jahn-Teller and volume-breathing orders in the ground-state structure with the a-a-c+ tilting pattern, whereas it vanishes in the antiferromagnetic configurations. The ground state of all superlattices is half-metallic ferromagnetic, not affected by the underlying series of structural transitions. Overall, these results outline a thickness-induced crossover between the physical properties of bulk La2/3Sr1/3MnO3 and bulk LaMnO3.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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