Dielectric spectroscopy in benzophenone: The beta relaxation and its relation to the mode-coupling Cole-Cole peak

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dc.creatorPardo, L. C.
dc.creatorLunkenheimer, P.
dc.creatorLoidl, A.
dc.date2007-07-18
dc.date2007-10-08
dc.date.accessioned2026-07-07T08:34:17Z
dc.date.available2026-07-07T08:34:17Z
dc.descriptionWe report a thorough characterization of the glassy dynamics of benzophenone by broadband dielectric spectroscopy. We detect a well pronounced beta relaxation peak developing into an excess wing with increasing temperature. A previous analysis of results from Optical-Kerr-effect measurements on this material within the mode coupling theory revealed a high-frequency Cole-Cole peak. We address the question if this phenomenon also may explain the Johari-Goldstein beta relaxation, a so far unexplained spectral feature inherent to glass-forming matter, mainly observed in dielectric spectra. Our results demonstrate that according to the present status of theory, both spectral features seem not to be directly related.
dc.description4 pages, 3 figures; second version as published; small changes of text according to referee suggestions; title changed according to editor's demands
dc.identifierhttps://arxiv.org/abs/0707.2800
dc.identifierhttp://arxiv.org/abs/0707.2800
dc.identifierPhys. Rev. E 76, 030502(R) (2007)
dc.identifierdoi:10.1103/PhysRevE.76.030502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139380
dc.subjectDisordered Systems and Neural Networks
dc.subjectSoft Condensed Matter
dc.titleDielectric spectroscopy in benzophenone: The beta relaxation and its relation to the mode-coupling Cole-Cole peak
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