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The anomalous Stark effect of single terrylene molecules in p-terphenyl crystals

hal.structure.identifierInstitut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
dc.contributor.authorBORDAT, Patrice
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorORRIT, M.
hal.structure.identifierInstitut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
dc.contributor.authorBROWN, Ross
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorWÜRGER, Aloïs
dc.date.issued2000
dc.identifier.issn0301-0104
dc.description.abstractEnSingle terrylene molecules embedded in a p-terphenyl crystal behave like well-defined optical switches. Recent measurements of the shift of their optical lines under an applied electric field (Stark effect) have revealed surprising anomalies: unexpectedly large and widely spread differences of polarizability between the ground and excited states, even in crystals of excellent quality. Some molecules even had a greater polarizability in the ground than in the excited state. We propose to explain these results by a symmetry breaking in the supermolecule (including the terrylene molecule and the first shells of p-terphenyl neighbours), leading to two distorted conformations with opposite dipole moments. Tunnelling between these conformations gives rise to a quadratic Stark effect with a large effective polarizability. The model is internally consistent, and provides reasonable orders of magnitude for the tunnel barrier. We argue that this tunnelling involves correlated movements of groups of atoms, 1 nm apart, and therefore the system is particularly sensitive to small residual strains in otherwise perfect crystals.
dc.language.isoen
dc.publisherElsevier
dc.title.enThe anomalous Stark effect of single terrylene molecules in p-terphenyl crystals
dc.typeArticle de revue
dc.identifier.doi10.1016/S0301-0104(00)00173-7
dc.subject.halPhysique [physics]
bordeaux.journalChemical Physics
bordeaux.page63-72
bordeaux.volume258
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-01550497
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01550497v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemical%20Physics&rft.date=2000&rft.volume=258&rft.issue=1&rft.spage=63-72&rft.epage=63-72&rft.eissn=0301-0104&rft.issn=0301-0104&rft.au=BORDAT,%20Patrice&ORRIT,%20M.&BROWN,%20Ross&W%C3%9CRGER,%20Alo%C3%AFs&rft.genre=article


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