ARPES在銅氧化物高溫超導體中的應(yīng)用.pdf

1、碩士學位論文ARPEs在銅氧化物高溫超導體中的應(yīng)用AppⅡ∞舶n0ftheARPES咖tlleHigh☆mpe瑚11lreCuprateSuperconductors姓名學科專業(yè)研究方向指導教師完成時間朱玉英學校代碼：10357芎號：2。，2。理論物理凝聚態(tài)物理婁平2005年5月AhItractAbstractAsweallkIlow，BednorzandMuIlerfoundtheHi曲TcSuperconductor(abHTSc)

2、firstin1986，sincethen，hundredsofh垃htemperaturecupratesuperconductorshavebeenfound，wehavenotfourdthemechanismofthemyet，buttheunderstandingforthecharacteristicsoftheHTSCde印ened，especiallyforsOmephysicalquestionsaboutthemec

3、hanism，forexampIeexisttheCu02layer，thesuperconductiIlgenergygaphasthedwaveorderparameter，andthenormalstatehaspseudogapetcInthisprocessARPES—an91eresolvedphotoemissjonSpectroscopyhasplayedamajorroleThisisbecauseARPESisthe

4、bestdirectmeasuretostudytheelectronicstructureofthesoIidMofeover’int啪dimensions，ARPESdirectlyprobesthesinglepaniclespectralfhction，a11dthereforeoffersacompletepictureofthemanybodyimeractionsinherentinthesestronglycorrela

5、tedsystemsTheARPESofHTSCisunsymmetricalButtheoretically，intheHubbardphenomenologicalmodel，onthebas逸of‘‘panicle—holesymmet—caIcharactefiStic”，weoRengetthesymmetricaIdis缸butionofthespectralfhnction州ththenearestne培hborhoppi

6、ngonlyInthispapertheinnuenceofpseudog印andtheneXtnearestneighborhoppingonthe^。RPESisstudiedonthesamemodeI，wecaJcuIatethespectral硒ctionandthedensi哆ofstatesunderthemeall一fieldapproxim砒ionItisfoundmatmeresunsmimicthepropenks

7、ofcupratequitewelLInthe五rstchapterofthc礬cleweimoducemeprincipleoftheARPESInthesecondchapterweintroducethebasicpropertiesoftheHTSCWbenumeratesomeapplicationsoftheARPESonthestudyoftheHTscint11ethirdchapteLThenwecaIculateth

8、espectraIfunctionandt11edensityofstacesundermemean—fIeldapproximationThenearestandthenextnearestneighborhoppingontheA剛ESbeconsideredtogeIheLChapterfiVeslheconclusionoftheartjcleKeywords：ARPESHi曲TcSuperconductorsnextneare