CuO和TiO2纳米结构薄膜的电阻开关性质的研究

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1、河南大学硕士学位论文CuO和TiO<,2>纳米结构薄膜的电阻开关性质的研究姓名：赵文超申请学位级别：硕士专业：凝聚态物理指导教师：张兴堂20090601纳米颗粒薄膜及有关文献报道非常不同的实验现象。至今，我们还没有找到合适的理论模型去分析我们得到的实验现象和讨论其输运机制。也许以后在对其进行更深入的研究后能使我们得以解释这种现象关键词：CuO；Ti02纳米介孔薄膜；电阻开关：空间电荷限制电流(SCLC)AbstractWhiletraditionalmemoriesareapproachingtheirsc

2、alinglimits，thenextgenerationnonvolatilememoryhasattractedextensiveattention．Oneofthepromisingcandidatesistheresistiverandomaccessmemory(RRAM)duetoitssuperiorcharacteristicsincludingsimplestructure，highdensityintegration，lowpowerconsumption，andfastwrite／er

3、aseoperation．Recently，resistiveswitchinginsimplebinarytransitionmetaloxidethinfilms，suchasCuOandTi02，attractsgreatinterestforapossibleapplicationinnonvolatilememorydevices．Inthisletter,wehavemostlyinvestigatedtheresistiveswitchingpropertiesofCuOnanostructu

4、regrainFilmsandTi02nanostructuremesoporousthinfilms．InChapter2，thecopperoxidethinfilmsweredepositedongalssfloorbyionicsheafspatterwithhightemperatureannealingmethod．Wehavestudiedthesurfacemorphology，crystallinephasesandchemistryvaluebyatomicDFMmodelofscann

5、ingprobemicroscope(SPM)，x-raydiffraction(XRD)andx-rayphotoelectronspectroscopy(XPS)．WealsohavestudieditsphotoswitchingpropertiesbyC-AFMmodelofscanningprobemicroscope(SPM)．InChapter3，wehaveinvestigatedthehysteretic／-VcharacteristicsofAu／CuO／Auheterostructur

6、es．SCLconductioncontrolledbyAu／CuOinterfacetrapswithexponentialdistributioninenergyisemployedtodescribethecarriertransportprocess．Thehysteresisisobservedwhenthecardertrappinglevelcomestothesituationinwhichthe／-VcurvesshowtheTFLconductionmechanism，andCanbea

7、ttributedtoretentionpropertyoftrappedcarriers．ThehighandlowresistancestatesinducedbyvoltagepulsesarealsodependentonthecardertrappinglevelsandtheresistanceswitchingCanberegardedasthechangesoftrapleveldistributioncausedbytrapping／detrappingprocessofholecarri

8、ers．ThisSCLconductionisattributedtointerfaceinducedbulklikelimitedeffectbecausethetrapsdominatingthecardertransportarelocatedattheAu／CuOinterface．Carriersfilledtrapswithexponentialdistributioninenergyshowthen