Real-space first-principles approach to orbitronic phenomena in metallic multilayers
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915452163194880 |
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| author | Cardias, Ramon Strand, Hugo U. R. Bergman, Anders Klautau, A. B. Rappoport, Tatiana G. |
| author_facet | Cardias, Ramon Strand, Hugo U. R. Bergman, Anders Klautau, A. B. Rappoport, Tatiana G. |
| contents | We develop a real-space first-principles method based on density functional theory to investigate orbitronic phenomena in complex materials. Using the Real-Space Linear Muffin-Tin Orbital method within the Atomic Sphere Approximation (RS-LMTO-ASA) combined with a Chebyshev polynomial expansion of the Green's functions, we compute orbital (spin) Hall transport and orbital (spin) accumulation directly in real space. The approach scales linearly with system size and naturally incorporates disorder, finite-size effects, and interface roughness. We apply the method to transition-metal-based heterostructures and demonstrate the emergence of substantial orbital (spin) accumulation, even in centrosymmetric systems. Our methodology provides a scalable and flexible framework for realistic simulations of orbital transport phenomena in complex heterostructures. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_14270 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Real-space first-principles approach to orbitronic phenomena in metallic multilayers Cardias, Ramon Strand, Hugo U. R. Bergman, Anders Klautau, A. B. Rappoport, Tatiana G. Materials Science We develop a real-space first-principles method based on density functional theory to investigate orbitronic phenomena in complex materials. Using the Real-Space Linear Muffin-Tin Orbital method within the Atomic Sphere Approximation (RS-LMTO-ASA) combined with a Chebyshev polynomial expansion of the Green's functions, we compute orbital (spin) Hall transport and orbital (spin) accumulation directly in real space. The approach scales linearly with system size and naturally incorporates disorder, finite-size effects, and interface roughness. We apply the method to transition-metal-based heterostructures and demonstrate the emergence of substantial orbital (spin) accumulation, even in centrosymmetric systems. Our methodology provides a scalable and flexible framework for realistic simulations of orbital transport phenomena in complex heterostructures. |
| title | Real-space first-principles approach to orbitronic phenomena in metallic multilayers |
| topic | Materials Science |
| url | https://arxiv.org/abs/2508.14270 |