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000189036 037__ $$aFZJ-2015-02293
000189036 1001_ $$0P:(DE-Juel1)131044$$aWuttke, Joachim$$b0$$eCorresponding Author$$ufzj
000189036 1112_ $$aXIV International Workshop on Complex Systems.$$cFai della Paganella$$d2015-03-22 - 2015-03-25$$wItaly
000189036 245__ $$aThe unimpressive origin of the apparent fragile-strong transition.
000189036 260__ $$c2015
000189036 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1429098058_26845$$xPlenary/Keynote
000189036 3367_ $$033$$2EndNote$$aConference Paper
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000189036 3367_ $$2BibTeX$$aINPROCEEDINGS
000189036 520__ $$aSupercooled water is suspected to undergo a fragile-strong transition (FST).Theoretical interest has been fostered by a possible connection with a Widomline emanating from the phase boundary between low and high densityamorphous ice. Experimental support for the FST has mostly come from high-resolution neutron spectroscopy. The FST appears as a kink in the temperaturedependence of a mean relaxation time <τ>. This interpretation depends criticallyon the assumption that the experiment sees one and the same relaxationprocess above and below the kink. Based on new backscattering spectra ofwater in carbon nanohorns we show that the contrary is the case.Formally, our fit function is the same as regularly used in support of a FST: a sumof a delta line, accounting for elastic scattering by the matrix, and a Kohlrauschspectrum. This model suffers from parameter degeneracies. Occam's razor tellsus to maximize constraints under minimal physical assumptions. We useharmonic extrapolations of the T dependent scattering intensity to fix theamplitudes in our delta-plus-Kohlrausch fits. We then identify two q,T regions thatadmit particularly stringent constraints, and a crossover regime in between. Inthis way, we find that quasielastic scattering reveals different physics in differentq,T regimes: At low T, it is dominated by localized motion; at high T by relaxation-coupled diffusion.
000189036 536__ $$0G:(DE-HGF)POF3-6215$$a6215 - Soft Matter, Health and Life Sciences (POF3-621)$$cPOF3-621$$fPOF III$$x0
000189036 536__ $$0G:(DE-HGF)POF3-6G15$$a6G15 - FRM II / MLZ (POF3-6G15)$$cPOF3-6G15$$fPOF III$$x1
000189036 536__ $$0G:(DE-HGF)POF3-6G4$$a6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)$$cPOF3-623$$fPOF III$$x2
000189036 65027 $$0V:(DE-MLZ)SciArea-120$$2V:(DE-HGF)$$aCondensed Matter Physics$$x1
000189036 65027 $$0V:(DE-MLZ)SciArea-210$$2V:(DE-HGF)$$aSoft Condensed Matter$$x0
000189036 65017 $$0V:(DE-MLZ)GC-2004-2016$$2V:(DE-HGF)$$aBasic research$$x2
000189036 65017 $$0V:(DE-MLZ)GC-180$$2V:(DE-HGF)$$aOthers$$x1
000189036 65017 $$0V:(DE-MLZ)GC-140$$2V:(DE-HGF)$$aSoft Matter, Macromolecules, Complex fluids, Biophysics $$x0
000189036 693__ $$0EXP:(DE-MLZ)SPHERES-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)SPHERES-20140101$$6EXP:(DE-MLZ)NL6S-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eSPHERES: Backscattering spectrometer$$fNL6S$$x0
000189036 7001_ $$0P:(DE-HGF)0$$aBellissent-Funel, Marie-Claire$$b1
000189036 7001_ $$0P:(DE-HGF)0$$aKaneko, Katsumi$$b2
000189036 7001_ $$0P:(DE-HGF)0$$aOhba, Tomonori$$b3
000189036 7001_ $$0P:(DE-Juel1)130507$$aAppavou, Marie-Sousai$$b4$$ufzj
000189036 7001_ $$0P:(DE-Juel1)158059$$aSoininen, Antti$$b5$$ufzj
000189036 773__ $$y2015
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000189036 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)131044$$aForschungszentrum Jülich GmbH$$b0$$kFZJ
000189036 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130507$$aForschungszentrum Jülich GmbH$$b4$$kFZJ
000189036 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)158059$$aForschungszentrum Jülich GmbH$$b5$$kFZJ
000189036 9130_ $$0G:(DE-HGF)POF2-451$$1G:(DE-HGF)POF2-450$$2G:(DE-HGF)POF2-400$$aDE-HGF$$bSchlüsseltechnologien$$lBioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung$$vSoft Matter Composites$$x0
000189036 9130_ $$0G:(DE-HGF)POF2-54G24$$1G:(DE-HGF)POF2-540$$2G:(DE-HGF)POF2-500$$aDE-HGF$$bStruktur der Materie$$lForschung mit Photonen, Neutronen und Ionen (PNI)$$vJCNS$$x1
000189036 9131_ $$0G:(DE-HGF)POF3-621$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6215$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vIn-house research on the structure, dynamics and function of matter$$x0
000189036 9131_ $$0G:(DE-HGF)POF3-6G15$$1G:(DE-HGF)POF3-6G0$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6G15$$aDE-HGF$$bForschungsbereich Materie$$lGroßgeräte: Materie$$vFRM II / MLZ$$x1
000189036 9131_ $$0G:(DE-HGF)POF3-623$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6G4$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vFacility topic: Neutrons for Research on Condensed Matter$$x2
000189036 9141_ $$y2015
000189036 9201_ $$0I:(DE-Juel1)JCNS-FRM-II-20110218$$kJCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II$$lJCNS-FRM-II$$x0
000189036 9201_ $$0I:(DE-Juel1)JCNS-1-20110106$$kNeutronenstreuung ; JCNS-1$$lNeutronenstreuung $$x1
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