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http://dx.doi.org/10.18419/opus-7633
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DC Element | Wert | Sprache |
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dc.contributor.author | Swietlik, Roman | de |
dc.contributor.author | Schweitzer, Dieter | de |
dc.contributor.author | Keller, Heimo J. | de |
dc.date.accessioned | 2011-07-27 | de |
dc.date.accessioned | 2016-03-31T11:43:44Z | - |
dc.date.available | 2011-07-27 | de |
dc.date.available | 2016-03-31T11:43:44Z | - |
dc.date.issued | 1987 | de |
dc.identifier.other | 353225320 | de |
dc.identifier.uri | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-64909 | de |
dc.identifier.uri | http://elib.uni-stuttgart.de/handle/11682/7650 | - |
dc.identifier.uri | http://dx.doi.org/10.18419/opus-7633 | - |
dc.description.abstract | The resonance Raman spectra of I3- anions in the organic superconductor β-(BEDT-TTF)2I3 [BEDT-TTF represents bis(ethylenedithio)tetrathiafulvalene] were studied and discussed in comparison with the nonsuperconducting phase of α-(BEDT-TTF)2I3. In both modifications at low temperature a splitting of the Raman mode assigned to the symmetric stretching mode of the I3- anions was discovered. The splitting of this mode in the β-(BEDT-TTF)2I3 crystals is related to the commensurate superstructure developed below 125 K in contradiction to the α phase where the splitting is related to a crystal-field effect. It is shown that an electronic excitation of the β-phase crystals by laser light can induce a structural transformation at least in a thin layer of the surface. This transformation is observed by a disappearance of the splitting of the symmetric stretching mode. The structural change can be related to a transformation from the commensurate superstructure with a superconducting transition temperature Tc=1.3 K into a more ordered and symmetric structure which becomes superconducting at Tc=8.1 K. | en |
dc.language.iso | en | de |
dc.rights | info:eu-repo/semantics/openAccess | de |
dc.subject.classification | Tetrathiafulvalen , Organischer Supraleiter , Raman-Spektroskopie | de |
dc.subject.ddc | 530 | de |
dc.title | Resonance Raman investigations of the symmetric stretching mode of I3- anions in α and β phases of di-bis(ethylenedithio)tetrathiafulvalene tri-iodide | en |
dc.type | article | de |
ubs.fakultaet | Fakultätsübergreifend / Sonstige Einrichtung | de |
ubs.institut | Sonstige Einrichtung | de |
ubs.opusid | 6490 | de |
ubs.publikation.source | Physical review, B 36 (1987), S. 6881-6888. URL http://dx.doi.org./10.1103/PhysRevB.36.6881 | de |
ubs.publikation.typ | Zeitschriftenartikel | de |
Enthalten in den Sammlungen: | 15 Fakultätsübergreifend / Sonstige Einrichtung |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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schw113.pdf | 1,04 MB | Adobe PDF | Öffnen/Anzeigen |
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