Advances in momentum-resolved EELS of phonons, excitons and plasmons in 2D materials and their heterostructures
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866917003256659968 |
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| author | Elgvin, Cana Hage, Fredrik S. Elyas, Khairi F. Höflich, Katja Prytz, Øystein Koch, Christoph T. Nerl, Hannah C. |
| author_facet | Elgvin, Cana Hage, Fredrik S. Elyas, Khairi F. Höflich, Katja Prytz, Øystein Koch, Christoph T. Nerl, Hannah C. |
| contents | Functional nanomaterials, including 2D materials and their heterostructures are expected to impact fields ranging from catalysis, optoelectronics to nanophotonics. To realize their potential, novel experimental approaches need to be developed to characterize the combined materials and their components. Techniques using fast electrons, such as electron energy-loss spectroscopy (EELS), probe phenomena over an unrivaled energy range with high resolution. In addition, momentum-resolved EELS simultaneously records energy and momentum transfer to the sample and thus generates two-dimensional data sets for each beam position. This allows excitations that occur at large momentum transfer to be resolved, including those outside of the light cone and beyond the first Brillouin zone, all whilst retaining nanometer sized spatial selectivity. Such capabilities are particularly important when probing phonons, plasmons, excitons and their coupling in 2D materials and their heterostructures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_09444 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Advances in momentum-resolved EELS of phonons, excitons and plasmons in 2D materials and their heterostructures Elgvin, Cana Hage, Fredrik S. Elyas, Khairi F. Höflich, Katja Prytz, Øystein Koch, Christoph T. Nerl, Hannah C. Mesoscale and Nanoscale Physics Materials Science Functional nanomaterials, including 2D materials and their heterostructures are expected to impact fields ranging from catalysis, optoelectronics to nanophotonics. To realize their potential, novel experimental approaches need to be developed to characterize the combined materials and their components. Techniques using fast electrons, such as electron energy-loss spectroscopy (EELS), probe phenomena over an unrivaled energy range with high resolution. In addition, momentum-resolved EELS simultaneously records energy and momentum transfer to the sample and thus generates two-dimensional data sets for each beam position. This allows excitations that occur at large momentum transfer to be resolved, including those outside of the light cone and beyond the first Brillouin zone, all whilst retaining nanometer sized spatial selectivity. Such capabilities are particularly important when probing phonons, plasmons, excitons and their coupling in 2D materials and their heterostructures. |
| title | Advances in momentum-resolved EELS of phonons, excitons and plasmons in 2D materials and their heterostructures |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2510.09444 |