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2021-08-22
YanqiuSun,YuanLiu,SiyuanHong,ZhengChen,MengZhang,andYanwuXieRecently,two-dimensionalsuperconductivitywasdiscoveredattheoxideinterfacebetweenKTaO3andLaAlO3(orEuO),whosesuperconductingtransitiontemperatureTcisupto2.2Kandexhibitsstrongcrystalline-orientationdependence.However,theoriginoftheinterfacialelectrongas,whichbecomessuperconductingatlowtemperatures,remainselusive.TakingtheLaAlO3/KTaO3(111)interfaceasanexample,wehavedemonstratedthatthereexistsacriticalLaAlO3thicknessof∼3nm.Namely,athinnerLaA Read More
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2021-05-28
YiWu,YongjunZhang,FengDu,BinShen,HaoZheng,YuanFang,MichaelSmidman,ChaoCao,FrankSteglich,HuiqiuYuan,JonathanD.Denlinger,andYangLiuHeavyfermioncompoundsexhibitingaferromagneticquantumcriticalpointhaveattractedconsiderableinterest.Commontotwoknowncases,i.e.,CeRh6Ge4andYbNi4P2,isthatthe4fmomentsresidealongchainswithalargeinterchaindistance,exhibitingstrongmagneticanisotropythatwasproposedtobevitalfortheferromagneticquantumcriticality.Here,wereportanangle-resolvedphotoemissionstudyonCeRh6Ge4inwhichwe Read More
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2021-05-17
ZhengChen,YuanLiu,HuiZhang,ZhongranLiu,HeTian,YanqiuSun,MengZhang,YiZhou,JirongSun,YanwuXieTheoxideinterfacebetweenLaAlO3andKTaO3(111)canharborasuperconductingstate.Wereportthatbyapplyingagatevoltage(VG)acrossKTaO3,theinterfacecanbecontinuouslytunedfromsuperconductingintoinsulatingstates,yieldingadome-shapedTc-VGdependence,whereTcisthetransitiontemperature.Theelectricgatinghasonlyaminoreffectoncarrierdensitybutastrongoneonmobility.Weinterpretthetuningofmobilityintermsofchangeinthespatialprofileo Read More
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2021-05-10
YiWu,YuanFang,PengLi,ZhiguangXiao,HaoZheng,HuiqiuYuan,ChaoCao,Yi-fengYangYangLiuThe4f-electrondelocalizationplaysakeyroleinthelow-temperaturepropertiesofrare-earthmetalsandintermetallics,anditisnormallyrealizedbytheKondocouplingbetween4fandconductionelectrons.DuetothelargeCoulombrepulsionof4felectrons,thebandwidth-controlMott-typedelocalization,commonlyobservedind-electronsystems,isdifficultin4f-electronsystemsandremainselusiveinspectroscopicexperiments.Herewedemonstratethatthebandwidth-controlo Read More
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2021-05-06
FengSheng,ChenqiangHua,ManCheng,JieHu,XikangSun,QianTao,HengzheLu,YunhaoLu,MianzengZhong,KenjiWatanabe,TakashiTaniguchi,QinglinXia,Zhu-AnXuYiZhengExcitingphenomenamayemergeinnon-centrosymmetrictwo-dimensionalelectronicsystemswhenspin–orbitcoupling(SOC)1interplaysdynamicallywithCoulombinteractions2,3,bandtopology4,5andexternalmodulatingforces6,7,8.HerewereportsynergeticeffectsbetweenSOCandtheStarkeffectincentrosymmetricfew-layerblackarsenic,whichmanifestasparticle–holeasymmetricRashbavalleyformat Read More
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