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1、Vortexnanoliquidinhigh-temperaturesuperconductorsS.S.Banerjee1,S.Goldberg1,A.Soibel2,Y.Myasoedov1,M.Rappaport1,E.Zeldov1,F.delaCruz3,C.J.vanderBeek4,M.Konczykowski4,T.Tamegai5,andV.M.Vinokur61DepartmentofCondensedMatterPhysics,WeizmannInstituteofScience,Rehovot76100,
2、Israel2JetPropulsionLaboratory,CaliforniaInstituteofTechnology,Pasadena,California911093InstitutoBalseiroandCentroAt´omicoBariloche,CNEA,Bariloche,8400,Argentina4LaboratoiredesSolidesIrradi´es,CNRSUMR7642andCEA-CMS-DRECAM,EcolePolytechnique,91128Palaiseau,France5Depa
3、rtmentofAppliedPhysics,TheUniversityofTokyo,Hongo,Bunkyo-ku,Tokyo113-8656,Japan6MaterialsScienceDivision,ArgonneNationalLaboratory,Argonne,Illinois60439(February2,2008)Usingadifferentialmagneto-opticaltechniquetovisualizeflowoftransportcurrents,werevealanewdelocalizati
4、onlinewithinthereversiblevortexliquidregioninthepresenceofalowdensityofcolumnardefects.Thislineseparatesahomogeneousvortexliquid,inwhichallthevorticesaredelocalized,fromaheterogeneous“nanoliquid”phase,inwhichinterconnectednanodropletsofvortexliquidarecagedintheporeso
5、fasolidskeletonformedbyvorticespinnedoncolumnardefects.Thenanoliquidphasedisplayshighcorrelationalongthecolumnardefectsbutnotransversecriticalcurrent.PACSnumbers:74.25.Qt,74.25.Op,74.25.Sv,74.72.HsColumnardefects(CDs)createdinhigh-temperaturewithinthereversiblevortex
6、liquidphasethatseparatesasuperconductorsbyhigh-energyheavyionirradiationheterogeneous“nanoliquid”fromahomogeneousliquid.actasveryefficientpinningcentersforvorticesalignedOneoftheinterestingpropertiesofthisnovelnanoliq-alongtheCDs.Theeffectsofthiscorrelateddisorderuidpha
7、seistheabsenceofin-planedissipationlesssu-onthevortexpropertieshavebeeninvestigatedexten-perconductivity,whilethecoherencealongthec-axisissivelymainlyinthelimitofrelativelyhighdensityofCDsapparentlystillpreserved.wheretheenhancementinthecriticalcurrentforpracti-calap
8、plicationsismostsignificantandthevortexmatterisknowntoformtheBoseglassphase[1–4].Incon-200mmmmtrast,ourunderstandingoftheoppositelim
