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Critical dynamics at incommensurate phase transitions and NMR relaxation experiments

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dc.contributorVirginia Techen
dc.contributor.authorKaufmann, B. A.en
dc.contributor.authorSchwabl, Franzen
dc.contributor.authorTäuber, Uwe C.en
dc.contributor.departmentPhysicsen
dc.date.accessed2014-04-23en
dc.date.accessioned2014-05-07T15:36:52Zen
dc.date.available2014-05-07T15:36:52Zen
dc.date.issued1999-05en
dc.description.abstractWe study the critical dynamics of crystals which undergo a second-order phase transition from a high-temperature normal phase to a structurally incommensurate (IC) modulated phase. We give a comprehensive description of the critical dynamics of such systems, e.g., valid for crystals of the A(2)BX(4) family. Using an extended renormalization scheme, we present a framework in which we analyze the phases above and below the critical temperature T-I. Above T-I, the crossover from the critical behavior to the mean-field regime is studied. Specifically, the resulting width of the critical region is investigated. In the IC modulated phase, we consider explicitly the coupling of the order parameter modes to one-loop order. Here the Goldstone anomalies and their effect on measurable quantities are investigated. We show their relation with the postulated phason gap. While the theory can be applied to a variety of experiments, we concentrate on quadrupole-perturbed nuclear magnetic resonance (NMR) experiments. We find excellent agreement with these dynamical measurements and provide answers for some questions that arose from recent results. [S0163-1829(99)03417-7].en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft under Contract No. Schw. 348/6-1,2en
dc.description.sponsorshipDeutsche Forschungsgemeinschaften
dc.identifier.citationKaufmann, B. A.; Schwabl, F.; Tauber, U. C., "Critical dynamics at incommensurate phase transitions and NMR relaxation experiments," Phys. Rev. B 59, 11226 DOI: http://dx.doi.org/10.1103/PhysRevB.59.11226en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.59.11226en
dc.identifier.issn0163-1829en
dc.identifier.urihttp://hdl.handle.net/10919/47820en
dc.identifier.urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.59.11226en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectspin-lattice relaxationen
dc.subjectquadrupolar perturbed nmren
dc.subjectminimalen
dc.subjectrenormalizationen
dc.subjectepsilon-expansionen
dc.subjectcritical-behavioren
dc.subjectgoldstone modesen
dc.subjectsystemsen
dc.subjectcoexistenceen
dc.subjectferromagnetsen
dc.subjectattenuationen
dc.subjectphysics, condensed matteren
dc.titleCritical dynamics at incommensurate phase transitions and NMR relaxation experimentsen
dc.title.serialPhysical Review Ben
dc.typeArticle - Refereeden

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