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ID:62009986
大小:2.43 MB
页数:38页
时间:2021-04-12
《scaling hypotheses for nonfermi liquid quantum criticality缩放假设非费米液体的量子临界.ppt》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、Criticalfermisurfacesandnon-fermiliquidmetalsT.Senthil(MIT)TS,``Criticalfermisurfacesandnon-fermiliquidmetals”,PhysRevB,June08``TheoryofacontinuousMotttransitionintwodimensions”,PhysRevB,July08Precursor:TS,AnnalsofPhysics,‘06KillingaFermisurfaceExampleI:HeavyelectroncriticalpointsQuantumcri
2、ticalpointwithstrikingnon-fermiliquidphysicsMagneticmetalFermiliquidPressure/B-field/etcTheFermisurfacemayreconstructdramaticallyacrossthequantumcriticalpointduetolossofKondoscreening.dHvAinCeRhIn5CeRhIn5H.Shishido,R.Settai,H.Harima,&Y.Onuki,JPSJ74,1103(2005)Simplerexample–Motttransitionofo
3、nebandsystemsPossibleexperimentalrealizationofasecondorderMotttransitionExampleIII:HiTc``underlyingnormal”metallicgroundstate?PossibleevolutionsofFermisurfacewithdopingatT=0HowmightaFermisurfacedisappear?Electronicstructureatcriticality:``CriticalFermisurface”WhyacriticalFermisurface?Evolut
4、ionofsingleparticlegapWhyacriticalFermisurface?EvolutionofmomentumdistributionKillingaFermisurfaceSomeobviousconsequences/questionsScalingphenomenologyataquantumcriticalpointwithacriticalFermisurface?CriticalFermisurface:scalingforsingleparticlephysicsNewpossibility:angledependentexponentsL
5、eavingthecriticalpointApproachfromtheFermiliquidSpecificheatsingularityCritical2KfsurfaceImplicationsofangledependentexponentsFiniteTcrossoversTentativeapplicationtoproposedhiTccriticalpointCalculationalframeworkforcriticalFermisurfacesModelcalculationsOnlycurrentlyexistingframeworkforcalcu
6、lationsseemstobeaslaveparticletheory.Examples:KondobreakdownmodelforKondolatticesTheoryofacontinuousMotttransitionintwodimensionsModelcalculationsfortheMotttransitionStructureofcriticaltheoryCriticalFermisurfaceatMottcriticalityApproachfromFermiliquidCriticalthermodynamics/transportUniversa
7、lresistivityjumpCrossoveroutofcriticality:Andersonisdifferent(fromHiggs)FiniteTcrossovers:MarginalFermiliquidsSummary-IAtsomemetallicquantumcriticalpointstherewillbeanentiresurfaceofcriticalfermionicmodesa`criticalFermisurface’.Presenceofcriticalfermisur
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