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1、weekendingPRL101,197801(2008)PHYSICALREVIEWLETTERS7NOVEMBER2008ExperimentalTestofCurvature-DrivenDynamicsinthePhaseOrderingofaTwoDimensionalLiquidCrystal123314AlbertoSicilia,JefersonJ.Arenzon,IngoDierking,AlanJ.Bray,LeticiaF.Cugliandolo,JosuMartı´nez
2、-Perdiguero,45IbonAlonso,andInmaculadaC.Pintre1Universite´PierreetMarieCurieParisVI,LPTHEUMR7589,4PlaceJussieu,75252ParisCedex05,France2InstitutodeFı´sica,UniversidadeFederaldoRioGrandedoSul,CP15051,91501-970PortoAlegreRS,Brazil3SchoolofPhysicsandAst
3、ronomy,UniversityofManchester,ManchesterM139PL,UnitedKingdom4DepartamentodeFı´sicadelaMateriaCondensada,FacultaddeCiencias,UniversidaddelPaı´sVasco,Apartado644,48080Bilbao,Spain5Quı´micaOrga´nica,FacultaddeCiencias,InstitutodeCienciadeMaterialesdeAra
4、go´n,UniversidaddeZaragoza-CSIC,50009Zaragoza,Spain(Received13June2008;published7November2008)Westudyelectricfielddrivenderacemizationinanachiralliquidcrystalthroughtheformationandcoarseningofchiraldomains.Itisproposedthatderacemizationinthissystemisa
5、curvature-drivenprocess.Wetestthispredictionusingtherecentlyobtainedexactresultforthedistributionofhull-enclosedareasintwo-dimensionalcoarseningwithnonconservedscalarorderparameterdynamics[J.J.Arenzonetal.,Phys.Rev.Lett.98,145701(2007)].Theexperiment
6、aldataareinverygoodagreementwiththetheory.Wethusdemonstratethatderacemizationinsuchbent-coreliquidcrystalsbelongstotheAllen-Cahnuniversalityclass,andthattheexactformula,whichgivesusthestatisticsofdomainsizesduringcoarsening,canalsobeusedasastricttest
7、forthisdynamicuniversalityclass.DOI:10.1103/PhysRevLett.101.197801PACSnumbers:64.70.mj,64.60.CnManyaspectsofthenonequilibriumrelaxationofmac-astowhethermorecomplicatedexperimentalsystemsroscopicsystemsstillremaintobegrasped.Thedomaincouldalsobedescri
8、bedbysuchauniversalformula.growthoftwocompetingequilibriumphasesafteraInthisLetterwetestthisresultexperimentallyinaquenchfromthedisorderedphaseisarelativelysimpleliquidcrystalsystemandwefindaverygoodagreementout-of-equilibriumproblemandinsomecasesthem
