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简介：HeteroepitaxialLaAlO3filmsweregrownonaSrTiO3/Si(100)substratebylasermolecularbeamepitaxyunderdifferentoxygenpressures,andtheirpropertiessuchascrystallinityandelectricalcharacteristicswereexperimentallyinvestigatedusingthevariousmeasurementmethods.Theresultsshowthatmostpropertiesdependmainlyonthedepositionoxygenpressure.ThecrystallinityandtheC-VandI-Vcharacteristicscanbegreatlyimprovedwiththeincreasingoxygendepositionpressure.Moreover,afterannealedat1050~CinN2ambient,theC-VandI-VcharacteristicsofLAOfilmsdepositedattheloweroxygenpressurearealsoimprovedduetothedecreaseofoxygenvacanciesinLAOfilms.

简介：PorousSi3N4self-reinforceceramicswerepreparedbygelcastingusingagarosesolutions.Bychangingtheagarosecontentintheslurries,theporoussiliconnitrideceramicswithdifferentporosities,α→β-Si3N4phasetransformation,andmechanicalpropertieswereobtained.Whentheagarosecontentchangedfrom0.2%to0.8%(w/w,basedonpowder),theporositiesincreasedfrom10.3%to21.4%,whilethefracturestrengthdecreasedfrom455to316MPaandthefracturetoughnessdecreasedfrom6.6to5.5MPa·m1/2.Manyfibrousβ-Si3N4grainsgrownfromtheinternalwalloftheroundporesisthetypicalmicrostructureofthegelcastingporoussiliconnitrideceramic.Bothelongatedβ-Si3N4grainsandsuitableinterfacialbondingstrengthcontributestohighfracturetoughnessbyfavoringcrackdeflectionandbridging.Thegrowthmechanismsoffibrousgrainsresultedfromthesynergyofsolution-diffusion-reprecipitationandvapor-liquid-solid(VLS).

简介：IntercalationcompoundFePS3(CoCp2)0.40(CoCp2=cobaltocene)wassynthesized,andthecrystalstructureandmagneticpropertieswerestudiedbyx-raydiffraction,magneticsusceptibilitymeasurement,andMSssbauerspectroscopy.Thecrystalstructurewasindexedtomonoclinicunitcellwitha=5.996^。A,b=10.106^。A,c=12.511^。A,β=105.916°,andabout5.6^。Aexpansionatthec-directioncomparedtopureFePS3.TheMSssbauerspectraindicatethattherearethreekindsofdivalentionswithhighspinstateintheintercalationcompound,whichimplieschargetransferfromguesttotheFe-Se^*ganti-bondingorbitsofthehostlattice.Nocationicvacanciesareformedintheintercalationcompound.Theferromagnetismatlowtemperatureoriginatesfromthespincantingofdivalentions.

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简介：我们调查在中国顶由城市的公共交通网络(UPTN)例示的复杂网络的拓扑的特征--十个最大的城市。UPTN有小世界行为，这被发现，由他们的拓扑的参数的考试。UPTN的运输效率的定量分析例如揭示他们的更高本地的效率E-l和更低的全球效率，它仍然在他们的发展中的阶段与那些中国城市的现状与一致很好。而且，在UPTN的效率的拓扑的性质也被检验，并且调查结果在一方面，显示那theUPTNs表演坚韧性到到对全球规模的恶意的攻击的随机的攻击和易碎性；在另外的手，在UPTN效率之间的相互关系和网络主题值得我们的注意。互连UPTN效率的主题总是是三角形形式的模式，例如主题标志238，标志174和标志102，等等。

简介：锌闪锌矿InGaN/GaNQW结构的光性质用multiband被调查有效团的理论。在300K的转变波长价值在调查范围从440～570nm在里面作文和井宽度。理论波长与试验性的结果显示出合理同意。光获得与增加的井宽度减少。因为光矩阵元素与井宽度增加，这主要由于在quasi-Fermi-level分离的减小。

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简介：Au-core/Pt-shellnanorods(Au@PtNR)被一个Au调停nanorod的生长方法准备了，并且他们在联合条件下面展出高电磁的地改进。由Au核心产生的高电磁的领域的远程的效果增加了，电磁的领域改进能被改变nanostructures的形态学控制。在这研究，我们用有限差别时间域(FDTD)在电磁的领域改进的模拟上报导结果方法，考虑Au@PtNR的真实形状。由于热点效果，电磁的领域能在磅nanodots之间是局部性的。电磁的领域改进被发现相当独立于磅内容，而本地粗糙和小锋利的特征力量显著地修改近地。当电磁的领域改进能被磅nanodots的分发在Au核心上调节，Au@PtNR能在相关区域发现潜在的应用。

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简介：ThispaperstudiestheequilibriumgeometriesandelectronicpropertiesofBenandBenLiclusters,upton=15,byusingdensity-functionaltheory(DFT)atB3LYP/6-31G(d)level.Thelowest-energystructuresofBenandBenLiclustersweredetermined.Theresultsindicatethatasinglelithiumimpurityenhancesthestabilityandchemicalreactivityoftheberylliumclusters.Itfindsthatthegeometriesofthehostclusterschangesignificantlyaftertheadditionofthelithiumatomforn≥8.Thelithiumimpuritypreferstobeontheperipheryofberylliumclusters,andoccupiesvertexsites.BothBe4Li,Be9Li,andBe13Liwerefoundtobeparticularlystablewithhigheraveragebindingenergy,localpeaksofsecond-orderenergydifferenceandfragmentationenergies.ForalltheBenLiclustersstudied,wefoundchargetransfersfromtheLitoBesiteandco-existenceofcovalentandmetallicbondingcharacteristics.更多还原

简介：高贵金属性的nanostructures展览专辑光性质源于表面电浆子的刺激。在各种各样的金属性的nanostructures之中，因为他们的唯一、吸引人的形状依赖者plasmonic性质，nanorods吸引了特别注意。Nanorods能支持横向、纵的电浆子模式，后者一强烈取决于nanorod的方面比率。这些模式能习惯性地被调节从对可见在红外线附近光谱区域。尽管nanorods广泛地被调查了，有很少研究，奉献给从nanorod形状背离的nanostructures。这评论在二种新奇quasi-one-dimensional银nanostructures，nanorice和nanocarrot的开发提供最近的进步的概述，包括他们在察觉到应用程序的plasmonic的综合体，水晶的描述，plasmonic性质分析，和性能。

简介：用特殊Painleve-Baecklund转变以及扩大印射的途径和线性重叠定理，我们获得的可变分离答案的新家庭(2+1)维的概括Broer-Kaup(GBK)系统。基于导出的准确答案，我们揭示局部性的刺激的一些新奇进化行为，即分裂和熔化现象在(2+1)维的GBK系统。

简介：TheoptoelectronicandmagneticpropertiesofpureHoMnO3andHo0.67T0.33MnO3(T=La,Y)alloysinhexagonalphasearetheoreticallyinvestigatedbyusingthefirst-principlescalculations.TheinvestigationsareperformedbymeansofthedensityfunctionaltheorythroughusingthespinpolarizedgeneralizedgradientapproximationplustheHubbardpotential(SPGGA+U,Ueff=3eV).ThestudiedmaterialHoMnO3exhibitstwoindirectbandgaps:1.58eVforthespinupstateand0.72eVforthespin-downstatealongtheS–GdirectionwithintheSPGGA+Uapproximation.ItisfoundthatthebandgapofpureHoMnO3forthespin-upstateincreaseswithincreasingLaandYdopants.Theresultsshowthatallofthestudiedmaterialshavesemi-metallicbehaviorsforthespin-upstateandsemiconductingcharacterforthespin-downstate.ThesubstitutionsofLaandYforHoinHoMnO3causethestaticdielectricconstant(ε0)toincreaseinthexdirectionbuttodecreaseinthezdirection.ThecalculatedopticalconductivityspectrumofHoMnO3inalowenergyrangeisingoodagreementwiththerecentexperimentaldata.

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简介：ByusingthegeneralizedDebyediffractionintegral,thispaperstudiesthespatialcorrelationpropertiesandphasesingularityannihilationofaperturedGaussianSchell-model(GSM)beamsinthefocalregion.Itisshownthatthewidthofthespectraldegreeofcoherencecanbelarger,lessthanorequaltothecorrespondingwidthofspectraldensity,whichdependsnotonlyonthescalarcoherencelengthofthebeams,butalsoonthetruncationparameter.Withagradualincreaseofthetruncationparameter,apairofphasesingularitiesofthespectraldegreeofcoherenceinthefocalplaneapproacheseachother,resultinginsubwavelengthstructures.Finally,theannihilationofpairsofphasesingularitiestakesplaceatacertainvalueofthetruncationparameter.Withincreasingscalarcoherencelength,theannihilationoccursatthelargertruncationparameter.However,thecreationprocessofphasesingularitiesoutsidethefocalplaneisnotfoundforGSMbeams.

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