简介：

简介：TheChineseAcademyofScienceshasrecentlyacquiredgoodprogressinsu-perconductorresearch.Belowisabriefintroductionofsomeresultswhicharerelatedtorareearths.LastDecember,aresearchteamoftheInstituteofPhysicsheadedbyProf.Li

简介：在这篇论文，超导的顺序参数和Bogoliubov刺激的精力光谱为铁磁性的超导体(FS)从Bogoliubov-deGennes(BdG)方程被获得。考虑散布效果的不平的接口，我们计算射击噪音和正常金属的绝缘体的微分传导力铁磁性的超导体连接。在FS的交换精力E_h能导致微分射击噪音山峰和传导力山峰切开，这被显示出。二座切开的山峰之间的精力差别等于2E_h。散布力量的不平的接口导致传导力山峰和射击noise-to-current比率的降下，但是增加射击噪音。

简介：Theglobalresearchofsuper-conductorshasbeenprevailingsincethediscoveryofrareearthoxidesuperconductingmaterialin1986.InChina,withtheco-effortsofallrelatedinstitu-tions,theresearchinthisfieldhaspercolatedintomanybranchesincludingphysics,chemistry,materialscience,electrotechnicsandelectronics.Asoneknows,thecriticalcurrentdensityisoneofthemostimportantindexesinsuper-conductors,andthatofYBaCuO

简介：Consideringthatinamagneticresonancesystem,ifthedetectioncoilcontributesdominantlytothesystemnoise,theperformanceofthewholesystemcancertainlybeimprovedbyswitchingtoadetectioncoilmadeofahigh-temperaturesuperconductor,andusingYBa2Cu3O7thinfilmson25×25mm^2LaAlO3substrates,wehavepreparedtwokindsofdetectioncoils:single-coilandtwo-coil.encouragingly,theirqualityfactorsaremeasuredtobeQ>2500fortwo-coil(at22.566MHzand77K)andQ>5500forsingle-coil(at92.3MHzand77K),respectively,Here,wedescribethedetailsofthedesign,fabricationandtestingofthecoils.

简介：Thisstudyconcernsatwo-dimensionalmodelandthecorrespondingvirtualcrackclosuretechnique(VCCT)implementedtosolvethegeneralboundaryvalueproblemsthatmayexplainwhyinterfacediscontinuityhaseffectsonthefracturebehaviorinthesuperconductor-substratesystem.Theinterfacialdiscontinuitycanbeclassifiedaccordingtothematerialproperties'continuityandtheirderivatives'continuityattheinterface.Fornonhomogeneoussuperconductorandsubstratespecimenswithvariousmaterialproperties,aVCCTmethodisdevelopedtocalculatetheirfracturebehavior.Furthermore,theeffectsofappliedmagneticfieldamplitudeandnonhomogeneousparametersareextensivelyandparametricallystudiedintwoactivationprocesses(zero-fieldcoolingandfieldcooling).Theintegrativeandcomputationalstudypresentedhereprovideafundamentalmechanisticunderstandingofthefracturemechanisminthesuperconductor-substratesystemandshedslightontherationaldesignofinterfacialcontinuity.

简介：Thenovelideathatspin-orbitcoupling(SOC)andans-wavepairingsystemcanleadtoinducedpwavepairingwithastrongmagneticlimit,hasstimulatedwidespreadinterestinsearchingforMajoranafermions(MFs)insemiconductor-superconductorhybridstructures.However,despitemajoradvancesinthesemiconductornanotechnology,thissystemhasseveralinherentlimitationsthatprohibittherealizationandidentificationofMFs.Weovercometheselimitationsbyreplacingthes-wavesuperconductorwiththetype-IIFulde-Ferrell(FF)superconductor,inwhichthecenter-of-massmomentumoftheCooperpairrenormalizesthein-planeZeemanfieldandchemicalpotential.Asaresult,MFscanberealizedinsemiconductornanowireswithsmallvaluesoftheLandég-factorandhighcarrierdensities.TheSOCstrengthdirectlyinfluencesthetopologicalboundary;thus,thetopologicalphasetransitionandassociatedMFscanbeengineeredbyanexternalelectricfield.Theoretically,almostallsemiconductornanowirescanbeusedtorealizeMFsbyusingtheFFsuperconductor.However,wefindthatInPnanowireismoresuitablefortherealizationofMFscomparedtoInAsandInSbnanowires.Thus,thisnewschemecantakefulladvantageofthesemiconductornanotechnologyfortherealizationofMFsinsemiconductor-superconductorhybridstructures.

简介：ThetunnelingspectrumofanelectronandaholeinasuperlattieeofNSjunctionsiscomputedusingtheBTKapproachandthetransfermatrixmethod.Itshowssharpresonancesatsomeenergiesabovethesuperconductinggap.Thesharpertheresonanceisthemorelayersthesuperlatticehas.Wefindforthefirsttimeamechanismtobalancetheincidentandoutgoingcurrentsonthesuperlatticebyaveragingoverthephasebetweentheincidentelectronandtheincidenthole.Thismechanismismorenaturalandphysicalthanthoseinliteratures.

简介：

简介：

简介：我们在场散布效果的杂质的系统的研究在超导体SrPt3P。用一固态反应方法，我们制作了做Pd的超导体Sr(磅1xPdx)3P.We发现剩余抵抗力0快速增加，Pd做，而剩余抵抗比率(RRR)显示戏剧的减小。另外，霍尔抵抗力xy的非线性的地依赖者行为和在低温度的霍尔系数RH的强壮的温度依赖被做的Pd压制。所有试验性的结果能被由做导致的杂质散布的增加解释。我们的结果建议磅位置对在现在的系统的搬运人传导很关键。

简介：VariousopticalluminescencespectroscopictechniqueswereusedtocharacterizethehighTcsuperconductorYBa2Cu3Ox.TheemissionbandsrevealthatCu3+coexistwithCu2+andCu+inthismaterial.

简介：Wesynthesized(Pb,Cd)Sr2(Y,Ca)Cu2O7+x,phasesuperconductor.AftersubstitutionofPbwithBi,theBiCd1212phaseshowsnosuperconductivity.AlthoughpreviousEXAFSstudyhasshownthelocalstructureenvironmentoftheCuissimilarinbothcompounds,EXAFSresultsofBiandPbheredemonstratethatσ2ofPb-Oin-planeislargerthanthatofBi-Oinplane,whereasσ^2ofPb-OapicalissmallerthanthatofBi-O,wheraseσ^2ofPb-OapicalissmallerthanthatofBi-Oapical.TheSrshellfeaturesarealsodiffernet,itappearedthatsuperconductivityneedssomedisorder.incarrierreservoirlayer,whichisduetothesubstitutionaldefectcausedbydifferentionicradii.

简介：TheprocesstoobtainhighT（110K）phasequickly,themicrostructureandpropertiesofAg-sheathedBi（Pb）-Sr-Ca-Cu-Osuperconductortapeshavebeenstudied.ItwasfoundthattheformationtimeofthehighTcphasewasgreatlyshortenedbytheadditionofmoreCaandCutothenominalcompositionofBi（Pb）:Sr:Ca:Cu=2:2:2:3andtheadoptionofappropriatesinteringtemperatureandcoolingrate.SuperconductorpowderwithpredominanthighT,phasewaspreparedaftera840C/50htreatment.TheJoftheAg-sheathedtapesandthemagneticfielddependenceofJwereobviouslyimprovedbyrepeatedlypres-singandsintering.Themaximumtransportcurrentdensityat77Kinazeromagneticfieldwas12,200A/cm2.ThemagneticdependenceofJwassummarizedasfollows:6.450A/cm2（B⊥1.B∥S.0.1T）1,810A/cm2（B⊥1.B∥S,1T）,390A/cm2（B⊥1.B∥S,2T）（B:magneticfield.1:electriccurrent.S:surfaceoftapes）.TheimprovementofJwasattributedtotheformationoftheplate-likestructurewithhomogeneouscompositiondistributionandthestrongc-axistexture.