多个介观电子器件间的电流交叉关联柯莎莎1，吕海峰1,2，杨华军1，郭永3，张怀武11电子科技大学物理电子学院电子薄膜与集成器件国家重点实验室，成都6100542香港大学物理系，香港3清华大学物理系低维量子物理国家重点实验室，北京100084摘要：本文分析了无直接相互作用的两个介观量子器件间的电流交叉关联特性，这两个器件共同库伦耦合于第三个介观器件。我们展示了在低偏压下无直接相互作用的这两个介观器件的电流关联并不弱于直接耦合的情形。更重要的是，流过这两个器件的电流间竞争与合作关系变得不可预测，关联特性依赖于能级的位置和连接导体的特性。当它们和连接导体的关联为零时，这两个间接耦合的量子器件的输运性质依然可以很强的关联在一起。关键词：凝聚态物理学；介观电子器件；电流交叉关联中图分类号：O469CurrentnoisecrosscorrelationsinmultiplemesoscopicconductorsKESha-Sha1,LUHai-Feng1,2,YANGHua-Jun1,GUOYong3,andZHANGHuai-Wu11StateKeyLaboratoryofElectronicThinFilmsandIntegratedDevicesandSchoolofPhysicalElectronics,UniversityofElectronicScienceandTechnologyofChina,Chengdu610054,China2DepartmentofPhysics,TheUniversityofHongKong,PokfulamRoad,HongKong,China3DepartmentofPhysicsandStateKeyLaboratoryofLow-DimensionalQuantumPhysics,TsinghuaUniversity,Beijing100084,ChinaAbstract:Weanalyzethecurrentnoisecrosscorrelations(CCs)betweenthecurrentsthroughtwomesoscopicconductorswithoutdirectinteraction,whereaconnectedconductoriscapaci-tivelycoupledwiththem.WedemonstratethattheCCsbetweentwoindirectly-coupledcon-ductorsdonotdecreasewhenthedeviceworksatlowbiasvoltages.Moreimportantly,thecompetitiveorcooperativerelationshipbetweentwocurrentsisalsounpredictable,whichde-pendsonthelevelconfigurationandthepropertyoftheconnectedconductor.EvenwhentheCCsbetweendirectly-coupledchannelsvanish,thetunnelingcurrentsthroughtwoindirectly-coupledconductorsarestillstronglycorrelated.Foundations:ThisprojectwassupportedbytheNationalBasicResearchProgramofChina(2011CB606405),theNSFC(No.11004022,11174168,61006081),andtheFundamentalResearchFundsfortheCentralUniversities(No.ZYGX2012J052).Briefauthorintroduction:Correspondingauthor:GUOYong,Male,Professor,presentmainresearchdi-rection:spin-polarizedtransportthroughkindsofmesoscopicsystems,spin-orbitcouplingeffects.E-mail：guoy66@mail.tsinghua.edu.cn-1-Keywords:condensedmatterphysics;multiplemesoscopicconductors;noisecrosscorrelationsRecentprogressinhigh-speedsingle-electronsourceshasshednewlightonthedevelop-mentofquantumelectronics.[1,2,3]Intheapplicationofintegratedsingle-electrondevices,oneseriousproblemisthattheeffectofCoulombinteractiononthecurrentcorrelationsisunavoidableinthenanoscaleregime.Itisanimportantissuetoinvestigatethecurrentnoisecrosscorrelations(CCs)involvingmultiplesingle-electronconductors.Forthecurrentsflowingthroughseveralinteractingconductors,theirzero-frequencynoiseCCreflectsthecooperativeorcompetitiverelationshipbetweenthetunnelingevents.[4,5,6]Itisnaturaltoimprovethefollowingquestions:Fortwomesoscopicconductorswithoutdirectinteractionbutcoupledwithathirdconductor,(i)istheCCbehaviorbetweentwoindirectly-coupledconductorsdeterminedbythesignsofothertwoCCs?(ii)IstheirCCdecayedorweakerthanthatoftwocapacitivelycoupledconductors?Actually,interactioninducedcurrent-currentcorrelationhasbeenalong-standingtopicinmesoscopicphysics.[4,5,6]Inanoninteractingsystem,thecorrelationbetweentrans-portelectronsembodiesantibunchingeffectduetotheFermistatistics.[7,8]However,elec-tronicbunchingcorrelationsandp...