Resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSe
Cyclotron resonance measurements in the highly polar (α = 0.29) semiconductor InSe are reported in pulsed magnetic fields up to 37 T. For B > 18 T two cyclotron branches are found which are a consequence of the resonant polaron interaction. This is the first time that both branches have been...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1992
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| _version_ | 1826271514553483264 |
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| author | Peeters, F Wu, X Devreese, J Watts, M Nicholas, R Howell, D van Bockstal, L Herlach, F Langerak, C Singleton, J Chevy, A |
| author_facet | Peeters, F Wu, X Devreese, J Watts, M Nicholas, R Howell, D van Bockstal, L Herlach, F Langerak, C Singleton, J Chevy, A |
| author_sort | Peeters, F |
| collection | OXFORD |
| description | Cyclotron resonance measurements in the highly polar (α = 0.29) semiconductor InSe are reported in pulsed magnetic fields up to 37 T. For B > 18 T two cyclotron branches are found which are a consequence of the resonant polaron interaction. This is the first time that both branches have been observed simultaneously in 2D, and both are observed over a range of more than 10 T. The splitting is approximately 40% of the optical phonon energy which results in a change in effective mass of a factor of two between the upper and lower branches. A detailed comparison is made with a theory for the cyclotron resonance spectrum. A second, much weaker resonant interaction is found for B ≈ 18 T. This is due to a resonant interaction with homopolar phonons and a theory is constructed for this interaction. At resonance the splitting is a very sensitive function of the interaction strength, allowing accurate determination of the coupling constant g2 = 0.001. © 1992. |
| first_indexed | 2024-03-06T21:57:51Z |
| format | Journal article |
| id | oxford-uuid:4d8a1363-6c7d-4958-bead-804af7246312 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:57:51Z |
| publishDate | 1992 |
| record_format | dspace |
| spelling | oxford-uuid:4d8a1363-6c7d-4958-bead-804af72463122022-03-26T15:56:03ZResonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4d8a1363-6c7d-4958-bead-804af7246312EnglishSymplectic Elements at Oxford1992Peeters, FWu, XDevreese, JWatts, MNicholas, RHowell, Dvan Bockstal, LHerlach, FLangerak, CSingleton, JChevy, ACyclotron resonance measurements in the highly polar (α = 0.29) semiconductor InSe are reported in pulsed magnetic fields up to 37 T. For B > 18 T two cyclotron branches are found which are a consequence of the resonant polaron interaction. This is the first time that both branches have been observed simultaneously in 2D, and both are observed over a range of more than 10 T. The splitting is approximately 40% of the optical phonon energy which results in a change in effective mass of a factor of two between the upper and lower branches. A detailed comparison is made with a theory for the cyclotron resonance spectrum. A second, much weaker resonant interaction is found for B ≈ 18 T. This is due to a resonant interaction with homopolar phonons and a theory is constructed for this interaction. At resonance the splitting is a very sensitive function of the interaction strength, allowing accurate determination of the coupling constant g2 = 0.001. © 1992. |
| spellingShingle | Peeters, F Wu, X Devreese, J Watts, M Nicholas, R Howell, D van Bockstal, L Herlach, F Langerak, C Singleton, J Chevy, A Resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSe |
| title | Resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSe |
| title_full | Resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSe |
| title_fullStr | Resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSe |
| title_full_unstemmed | Resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSe |
| title_short | Resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSe |
| title_sort | resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound inse |
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