Direct determination of the zero-field splitting for a single
When a Co²⁺ impurity is embedded in a semiconductor structure, crystal strain strongly influences the zero-field splitting between Co²⁺ states with spin projection S_{z}=±3/2 and S_{z}=±1/2. Experimental evidence of this effect has been given in previous studies; however, direct measurement of the s...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/114458 |
| _version_ | 1826212003633430528 |
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| author | Kobak, J. Bogucki, A. Smoleński, T. Koperski, M. Potemski, M. Kossacki, P. Golnik, A. Pacuski, W. Papaj, Michal |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Kobak, J. Bogucki, A. Smoleński, T. Koperski, M. Potemski, M. Kossacki, P. Golnik, A. Pacuski, W. Papaj, Michal |
| author_sort | Kobak, J. |
| collection | MIT |
| description | When a Co²⁺ impurity is embedded in a semiconductor structure, crystal strain strongly influences the zero-field splitting between Co²⁺ states with spin projection S_{z}=±3/2 and S_{z}=±1/2. Experimental evidence of this effect has been given in previous studies; however, direct measurement of the strain-induced zero-field splitting has been inaccessible so far. Here this splitting is determined thanks to magneto-optical studies of an individual Co²⁺ ion in an epitaxial CdTe quantum dot in a ZnTe barrier. Using partially allowed optical transitions, we measure the strain-induced zero-field splitting of the Co²⁺ ion directly in the excitonic photoluminescence spectrum. Moreover, by observation of anticrossing of S[subscript z]= ±3/2 and S[subscript z] =−1/2 Co²⁺ spin states in a magnetic field, we determine the axial and in-plane components of the crystal field acting on the Co²⁺ The proposed technique can be applied to optical determination of the zero-field splitting of other transition-metal ions in quantum dots. |
| first_indexed | 2024-09-23T15:14:57Z |
| format | Article |
| id | mit-1721.1/114458 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:14:57Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1144582022-10-02T01:39:15Z Direct determination of the zero-field splitting for a single Kobak, J. Bogucki, A. Smoleński, T. Koperski, M. Potemski, M. Kossacki, P. Golnik, A. Pacuski, W. Papaj, Michal Massachusetts Institute of Technology. Department of Physics Papaj, Michal When a Co²⁺ impurity is embedded in a semiconductor structure, crystal strain strongly influences the zero-field splitting between Co²⁺ states with spin projection S_{z}=±3/2 and S_{z}=±1/2. Experimental evidence of this effect has been given in previous studies; however, direct measurement of the strain-induced zero-field splitting has been inaccessible so far. Here this splitting is determined thanks to magneto-optical studies of an individual Co²⁺ ion in an epitaxial CdTe quantum dot in a ZnTe barrier. Using partially allowed optical transitions, we measure the strain-induced zero-field splitting of the Co²⁺ ion directly in the excitonic photoluminescence spectrum. Moreover, by observation of anticrossing of S[subscript z]= ±3/2 and S[subscript z] =−1/2 Co²⁺ spin states in a magnetic field, we determine the axial and in-plane components of the crystal field acting on the Co²⁺ The proposed technique can be applied to optical determination of the zero-field splitting of other transition-metal ions in quantum dots. 2018-03-29T18:49:51Z 2018-03-29T18:49:51Z 2018-01 2016-10 2018-02-07T20:55:04Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/114458 Kobak, J. et al. "Direct determination of the zero-field splitting for a single." Physical Review B 97, 4 (January 2018): 045305 © 2018 American Physical Society en http://dx.doi.org/10.1103/PhysRevB.97.045305 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Kobak, J. Bogucki, A. Smoleński, T. Koperski, M. Potemski, M. Kossacki, P. Golnik, A. Pacuski, W. Papaj, Michal Direct determination of the zero-field splitting for a single |
| title | Direct determination of the zero-field splitting for a single |
| title_full | Direct determination of the zero-field splitting for a single |
| title_fullStr | Direct determination of the zero-field splitting for a single |
| title_full_unstemmed | Direct determination of the zero-field splitting for a single |
| title_short | Direct determination of the zero-field splitting for a single |
| title_sort | direct determination of the zero field splitting for a single |
| url | http://hdl.handle.net/1721.1/114458 |
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