三維QED中的手征對稱破缺及其在高溫超導(dǎo)中的應(yīng)用.pdf

1、中國科學(xué)技術(shù)大學(xué)博士學(xué)位論文三維QED中的手征對稱破缺及其在高溫超導(dǎo)中的應(yīng)用姓名：劉國柱申請學(xué)位級別：博士專業(yè)：理論物理指導(dǎo)教師：程耕2003.5.1AbstractInthisthesis，wediscussthedynamicalchiralsynunetrybreaking(CSB)inthree—dimensionalquanmmelectrodynamics(3DQED)anditspllysicalapplicationst

2、oh譫hter印emmresuperconductorsAfcerabriefimrOductionofhightemperaturesupercOnductivityarldchiralsynlnletrybreaking，wegiVeareViewofthebasicphenOmenOlogyofhightemperamrecupratesupercOnductOrs，includingmewell—establishedexper

3、imentalfactsandt11enewexperilllentalresultsthosewerepublishedinthelastfiveyearsThenwediscussseveralimportanttheoriesthosehavebeenproposedtounderstandthestrangepheno【nenolOgyOfcupratesupercOnductorsWenextreViewthebasic口mp

4、ertiesofCSBin3DQEDItwasfoundmatthereisacriticalnavor，belowwhichmemasslessfermionscanacquifeafinitedynamicallygener拙dmassIntheunderdopedregion，wecoupleascalarfieldtotheU(1)gaugeneldandfoundthatCSBoccursinmepresenceoffreeb

5、oso璐Themasslessfermionsacquireafinitedynamicallygeneratedmass，whichprOvidesafinitegapthatshOuldbeOvercomeforanyfermiOIlStobeexcitedTherefore，atlOwte】fIlperatures，merearenofermionsintleunderlyinggrourldstateofunderdopedcu

6、pratesT11iscanexplainwhynesidual1irlearte肌ofthermalconductivitywasobservedinthisregiOn，whichwasregardedasanevidencefbrtllebreakdownOftheWiedema腫一Franz1awWethenconsidertheef艷ctofafinitegaugebosonmassonthebehaviOrofdvnamic

7、alCSBWefourldmatnlereisalsoacriticalvaluefofthegaugebosonmass，beVondwhichCSBcan110ttakeplaceSincethegaugebosonmasscanbeusedtodescribemebng—rangesupercOnductingOrderandCSBcanbeusedtodescribetheIong—rangeamiferromagneticor