| Effect of exciton-phonon coupling in the calculated optical absorption of carbon nanotubes. | |
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MedLine Citation:
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PMID: 15698227 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We find that the optical properties of carbon nanotubes reflect remarkably strong effects of exciton-phonon coupling. Tight-binding calculations show that a significant fraction of the spectral weight of the absorption peak is transferred to a distinct exciton+phonon sideband, which is peaked at around 200 meV above the main absorption peak. This sideband provides a distinctive signature of the excitonic character of the optical transition. The exciton-phonon coupling is reflected in a dynamical structural distortion, which contributes a binding energy of up to 100 meV. The distortion is surprisingly long ranged, and is strongly dependent on chirality. |
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Authors:
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Vasili Perebeinos; J Tersoff; Phaedon Avouris |
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Publication Detail:
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Type: Journal Article Date: 2005-01-19 |
Journal Detail:
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Title: Physical review letters Volume: 94 ISSN: 0031-9007 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2005 Jan |
Date Detail:
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Created Date: 2005-02-08 Completed Date: 2005-04-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 027402 Citation Subset: - |
Affiliation:
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IBM Research Division, T. J. Watson Research Center, Yorktown Heights, New York 10598, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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