基于拓?fù)浣^緣體的超導(dǎo)結(jié)的自旋輸運(yùn)性質(zhì)研究.pdf

1、學(xué)位論文獨(dú)創(chuàng)性聲明本人鄭重聲明：所提交的學(xué)位論文是本人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作和取得的研究成果。本論文中除引文外，所有實(shí)驗(yàn)、數(shù)據(jù)和有關(guān)材料均是真實(shí)的。本論文中除引文和致謝的內(nèi)容外，不包含其他人或其它機(jī)構(gòu)已經(jīng)發(fā)表或撰寫(xiě)過(guò)的研究成果。其他同志對(duì)本研究所做的貢獻(xiàn)均己在論文中作了聲明并表示了謝意。學(xué)位論文作者簽名：勻翻鋼日期：山瞳』礦學(xué)位論文使用授權(quán)聲明研究生在校攻讀學(xué)位期間論文工作的知識(shí)產(chǎn)權(quán)單位屬南京師范大學(xué)。學(xué)校有權(quán)保存本學(xué)位論文的電子和

2、紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部?jī)?nèi)容，可以采用影印、復(fù)印等手段保存、匯編本學(xué)位論文。學(xué)?？梢韵驀?guó)家有關(guān)機(jī)關(guān)或機(jī)構(gòu)送交論文的電子和紙質(zhì)文檔，允許論文被查閱和借閱。(保密論文在解密后遵守此規(guī)定)保密論文注釋?zhuān)罕緦W(xué)位論文屬于保密論文，密級(jí)：保密期限為年。學(xué)位論文作者簽名：釔嘲相指導(dǎo)教師簽名：Et期：≯心f逸日期：AbstractAbstractThediscoveryoftopologicalinsulator(TI)has

3、attractedmuchattentioninre(；entyearsTIshaveabulkbandgapandmetallicsurfacestatesduetothetimereversalsymmetryAvarietyofphenomenahavebeenpredictedorconfirmedafterthediscoveryofTIsIthasbeenprovedthatthetimereversalsymmetryma

4、ybebrokenwhensuperconductor(SC)andferromagneticinsulatorIyI)touchthesurfaceofaTITheproximityeffectgivessuperconductivityandferromagnetismonthesurface，andthusthevariationoftransportpropertiesApplyingthemethodbasedonanexte

5、ndedBogoliubivdeGennes(BdGlequation，westudythespin。polarizedtransportpropertiesinthetopologicalsuperconductingjunctioncomposedofFIandSConaTIFirstlyweinvestigatethespinpolarizedtransportfeaturesandthemanipulationofthespin

6、electronpairsentanglementintheFI／SC／FItopologicalsuperconductingjunctiononanarrowtwodimensionalTIItiSshownthatwhenthebiasvoltagesandthespinpolarizationofthetwoFIsareproperlyadjusted。intheenergywindowthenonlocalAndreevref

7、lectionprobabilityforonespinCanreach100％，whileisthoroughlysuppressedfortheotherspin，whichmeansthatpurespinentangledelectronpairsCanbeobtainedMoreinterestinglyintheenergywindownonlocalAndreevreflectionprobabilityintheanti

8、ferromagneticconfigurationiszero，andthusthecurrentsfortheleftandrightleadsarebothzero，indicating100％tunnelingmagnetoresistancewithhighlymagneticstorageefficiencyTheresultsCanbeexperimentallydemonstratedbymeasuringthetunn

9、elingconductanceandthenoisepowerItcouldbethetheoreticalguidanceforexperimentallydevelopingelectronicdevicewiththefunctionsofquantumcomputationandmagneticstorageofhighefficiencySecondlywestudythespinpolarizedtransportprop

10、ertiesinaFI／FI／SCjunctiononthesurfaceofathreedimensionalTIinarbitrarymagneticconfigurationWeinvestigatethevariationsoftunnelingconductancewiththeincidentangelofelectronatdifferentangelabetweenthedirectionsofthetwomagneti