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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2405.01826 |
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| _version_ | 1866910550046277632 |
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| author | Bourgeois, Marc R. Rossi, Andrew W. Masiello, David J. |
| author_facet | Bourgeois, Marc R. Rossi, Andrew W. Masiello, David J. |
| contents | Chiral phonons possessing valley pseudo angular momentum (PAM) underlie a diversity of quantum phenomena of fundamental and applied importance, but are challenging to probe directly. We show that deficiencies of typical momentum-resolved electron energy loss measurements that make it impossible to distinguish the PAM of chiral phonons can be overcome by introducing pinwheel free electron states with well-defined PAM. Transitions between such states generate 2D periodic arrays of in-plane field vortices with polarization textures tailored to selectively couple to desired chiral mode symmetries. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_01826 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Strategy for Direct Detection of Chiral Phonons with Phase-Structured Free Electrons Bourgeois, Marc R. Rossi, Andrew W. Masiello, David J. Materials Science Chiral phonons possessing valley pseudo angular momentum (PAM) underlie a diversity of quantum phenomena of fundamental and applied importance, but are challenging to probe directly. We show that deficiencies of typical momentum-resolved electron energy loss measurements that make it impossible to distinguish the PAM of chiral phonons can be overcome by introducing pinwheel free electron states with well-defined PAM. Transitions between such states generate 2D periodic arrays of in-plane field vortices with polarization textures tailored to selectively couple to desired chiral mode symmetries. |
| title | Strategy for Direct Detection of Chiral Phonons with Phase-Structured Free Electrons |
| topic | Materials Science |
| url | https://arxiv.org/abs/2405.01826 |