Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet
<jats:title>Abstract</jats:title><jats:p>In van der Waals (vdW) materials, strong coupling between different degrees of freedom can hybridize elementary excitations into bound states with mixed character<jats:sup>1–3</jats:sup>. Correctly identifying the nature and comp...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer Science and Business Media LLC
2022
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| Online Access: | https://hdl.handle.net/1721.1/141883 |
| _version_ | 1811097894641467392 |
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| author | Ergeçen, Emre Ilyas, Batyr Mao, Dan Po, Hoi Chun Yilmaz, Mehmet Burak Kim, Junghyun Park, Je-Geun Senthil, T Gedik, Nuh |
| author_facet | Ergeçen, Emre Ilyas, Batyr Mao, Dan Po, Hoi Chun Yilmaz, Mehmet Burak Kim, Junghyun Park, Je-Geun Senthil, T Gedik, Nuh |
| author_sort | Ergeçen, Emre |
| collection | MIT |
| description | <jats:title>Abstract</jats:title><jats:p>In van der Waals (vdW) materials, strong coupling between different degrees of freedom can hybridize elementary excitations into bound states with mixed character<jats:sup>1–3</jats:sup>. Correctly identifying the nature and composition of these bound states is key to understanding their ground state properties and excitation spectra<jats:sup>4,5</jats:sup>. Here, we use ultrafast spectroscopy to reveal bound states of <jats:italic>d</jats:italic>-orbitals and phonons in 2D vdW antiferromagnet NiPS<jats:sub>3</jats:sub>. These bound states manifest themselves through equally spaced phonon replicas in frequency domain. These states are optically dark above the Néel temperature and become accessible with magnetic order. By launching this phonon and spectrally tracking its amplitude, we establish the electronic origin of bound states as localized <jats:italic>d</jats:italic>–<jats:italic>d</jats:italic> excitations. Our data directly yield electron-phonon coupling strength which exceeds the highest known value in 2D systems<jats:sup>6</jats:sup>. These results demonstrate NiPS<jats:sub>3</jats:sub> as a platform to study strong interactions between spins, orbitals and lattice, and open pathways to coherent control of 2D magnets.</jats:p> |
| first_indexed | 2024-09-23T17:06:39Z |
| format | Article |
| id | mit-1721.1/141883 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T17:06:39Z |
| publishDate | 2022 |
| publisher | Springer Science and Business Media LLC |
| record_format | dspace |
| spelling | mit-1721.1/1418832022-04-13T16:34:20Z Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet Ergeçen, Emre Ilyas, Batyr Mao, Dan Po, Hoi Chun Yilmaz, Mehmet Burak Kim, Junghyun Park, Je-Geun Senthil, T Gedik, Nuh <jats:title>Abstract</jats:title><jats:p>In van der Waals (vdW) materials, strong coupling between different degrees of freedom can hybridize elementary excitations into bound states with mixed character<jats:sup>1–3</jats:sup>. Correctly identifying the nature and composition of these bound states is key to understanding their ground state properties and excitation spectra<jats:sup>4,5</jats:sup>. Here, we use ultrafast spectroscopy to reveal bound states of <jats:italic>d</jats:italic>-orbitals and phonons in 2D vdW antiferromagnet NiPS<jats:sub>3</jats:sub>. These bound states manifest themselves through equally spaced phonon replicas in frequency domain. These states are optically dark above the Néel temperature and become accessible with magnetic order. By launching this phonon and spectrally tracking its amplitude, we establish the electronic origin of bound states as localized <jats:italic>d</jats:italic>–<jats:italic>d</jats:italic> excitations. Our data directly yield electron-phonon coupling strength which exceeds the highest known value in 2D systems<jats:sup>6</jats:sup>. These results demonstrate NiPS<jats:sub>3</jats:sub> as a platform to study strong interactions between spins, orbitals and lattice, and open pathways to coherent control of 2D magnets.</jats:p> 2022-04-13T16:34:19Z 2022-04-13T16:34:19Z 2022-12 2022-04-13T16:30:39Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/141883 Ergeçen, Emre, Ilyas, Batyr, Mao, Dan, Po, Hoi Chun, Yilmaz, Mehmet Burak et al. 2022. "Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet." Nature Communications, 13 (1). en 10.1038/s41467-021-27741-3 Nature Communications Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Springer Science and Business Media LLC Nature |
| spellingShingle | Ergeçen, Emre Ilyas, Batyr Mao, Dan Po, Hoi Chun Yilmaz, Mehmet Burak Kim, Junghyun Park, Je-Geun Senthil, T Gedik, Nuh Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet |
| title | Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet |
| title_full | Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet |
| title_fullStr | Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet |
| title_full_unstemmed | Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet |
| title_short | Magnetically brightened dark electron-phonon bound states in a van der Waals antiferromagnet |
| title_sort | magnetically brightened dark electron phonon bound states in a van der waals antiferromagnet |
| url | https://hdl.handle.net/1721.1/141883 |
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