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Emergence of glassy-like dynamics in an orientationally ordered phase
hal.structure.identifier | Departament de Fisica i Enginyeria Nuclear [UPC, Barcelone] [ETSEIB] | |
dc.contributor.author | ROMANINI, M. | |
hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
dc.contributor.author | NÉGRIER, Philippe | |
hal.structure.identifier | Departament de Fisica i Enginyeria Nuclear [UPC, Barcelone] [ETSEIB] | |
dc.contributor.author | TAMARIT, Jose Luis | |
hal.structure.identifier | Dipartimento di Fisica | |
dc.contributor.author | CAPACCIOLI, Simone | |
hal.structure.identifier | Departament de Fisica i Enginyeria Nuclear [UPC, Barcelone] [ETSEIB] | |
dc.contributor.author | BARRIO, María | |
hal.structure.identifier | Departament de Fisica i Enginyeria Nuclear [UPC, Barcelone] [ETSEIB] | |
dc.contributor.author | PARDO, Luis C. | |
hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
dc.contributor.author | MONDIEIG, Denise | |
dc.date.created | 2011-09-27 | |
dc.date.issued | 2012 | |
dc.identifier.issn | 1098-0121 | |
dc.description.abstractEn | The dynamics of a simple rigid pseudoglobular molecule (2-adamantanone) has been studied by means of dielectric spectroscopy and examined under the constraints imposed by the space group of the crystal structure determined by x-ray powder diffraction. The low-temperature monoclinic structure of 2-adamantanone, with one molecule per asymmetric unit (Z′=1), displays a statistical intrinsic disorder, concerning the site occupancy of the oxygen atom along three different sites. Such a physically identifiable disorder gives rise to large-angle molecular rotations which inherently lead to time-average fluctuations of the molecular dipole, thus contributing to the dielectric susceptibility. The dielectric spectra for the low-temperature "ordered" phase displays a universal feature of glassy-like materials, i.e., coexistence of α- and β-relaxation processes. The former is clearly identified with the strongly restricted reorientational motions within the long-range "ordered" crystalline lattice. The latter, never observed before in fully translationally and highly orientationally ordered phases, displays all the properties of an original Johari-Goldstein β-relaxation, in spite of the strong character of this glass-like phase. These findings can be explained according to the coupling model, applied to such "ordered" phases. | |
dc.language.iso | en | |
dc.publisher | American Physical Society | |
dc.rights.uri | http://creativecommons.org/licenses/by-sa/ | |
dc.title.en | Emergence of glassy-like dynamics in an orientationally ordered phase | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1103/PhysRevB.85.134201 | |
dc.subject.hal | Chimie/Cristallographie | |
dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat] | |
bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
bordeaux.page | 134201 | |
bordeaux.volume | 85 | |
bordeaux.issue | 13 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-00701309 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-00701309v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&rft.date=2012&rft.volume=85&rft.issue=13&rft.spage=134201&rft.epage=134201&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=ROMANINI,%20M.&N%C3%89GRIER,%20Philippe&TAMARIT,%20Jose%20Luis&CAPACCIOLI,%20Simone&BARRIO,%20Mar%C3%ADa&rft.genre=article |
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