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Science: Fractal photonic topological insulators

2022-05-24

TOBIASBIESENTHAL,LUKASJ.MACZEWSKY,ZHАOJUYANG,MARKKREMER,MORDECHAISEGEV,ALEXANDERSZAMEIT,ANDMATTHIASHEINRICHTopologicalinsulatorsconstituteanovelstateofmatterwithscatter-freeedgestatessurroundinganinsulatingbulk.Conventionalwisdomregardstheinsulatingbulkasessential,sincetheinvariantsdescribingthetopologicalpropertiesofthesystemaredefinedtherein.Here,westudyfractaltopologicalinsulatorsbasedonexactfractalscomprisedexclusivelyofedgesites.Wepresentexperimentalproofthat,despitethelackofbulkbands,photo
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Nature: Early Solar System instability triggered by dispersal of the gaseous disk

2022-04-28

BeibeiLiu，SeanN.RaymondSethA.JacobsonTheSolarSystem’sorbitalstructureisthoughttohavebeensculptedbyanepisodeofdynamicalinstabilityamongthegiantplanets1,2,3,4.However,theinstabilitytriggerandtiminghavenotbeenclearlyestablished5,6,7,8,9.HydrodynamicalmodellinghasshownthatwhiletheSun’sgaseousprotoplanetarydiskwaspresentthegiantplanetsmigratedintoacompactorbitalconfigurationinachainofresonances2,10.Hereweusedynamicalsimulationstoshowthatthegiantplanets’instabilitywasprobablytriggeredbythedispersaloft
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Natural separation of two primordial planetary reservoirs in an expanding solar protoplanetary disk

2022-04-24

BEIBEILIU,ANDERSJOHANSEN,MICHIELLAMBRECHTS,MARTINBIZZARRO,ANDTROELSHAUGBØLLEMeteoritesdisplayanisotopiccompositiondichotomybetweennoncarbonaceous(NC)andcarbonaceous(CC)groups,indicatingthatplanetesimalformationinthesolarprotoplanetarydiskoccurredintwodistinctreservoirs.TheprevailingviewisthatarapidlyformedJupiteractedasabarrierbetweenthesereservoirs.Weshowafundamentalinconsistencyinthismodel:IfJupiterisanefficientblockerofdriftingpebbles,thentheinteriorNCreservoirisdepletedbyradialdriftwithinafe
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Spatiotemporal Differentiators Generating Optical Vortices with Transverse Orbital Angular Momentum and Detecting Sharp Change of Pulse Envelope

2022-03-24

JunyiHuang,JiahaoZhang,TengfengZhu,ZhichaoRuanAsanewdegreeoffreedomforopticalmanipulation,recently,spatiotemporalopticalvortices(STOVs)carryingtransverseorbitalangularmomentumshavebeenexperimentallydemonstratedwithpulseshapers.Here,aspatiotemporaldifferentiatorisproposedtogenerateSTOVswithtransverseorbitalangularmomentum.Inordertocreatephasesingularityinthespatiotemporaldomain,thespatiotemporaldifferentiatorisdesignedbybreakingspatialmirrorsymmetry.Incontrasttopulseshapers,thedeviceproposedherei
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Planet Formation Theory in the Era of ALMA and Kepler: from Pebbles to Exoplanets

2022-03-24

JoannaDrazkowska,BertramBitsch,MichielLambrechts,GijsD.Mulders,DanielHarsono,AllonaVazan,BeibeiLiu,ChrisW.Ormel,KatherineKretke,AlessandroMorbidelliOurunderstandingofplanetformationhasbeenrapidlyevolvinginrecentyears.Theclassicalplanetformationtheory,developedwhentheonlyknownplanetarysystemwasourownSolarSystem,hasbeenrevisedtoaccountfortheobserveddiversityoftheexoplanetarysystems.Atthesametime,theincreasingobservationalcapabilitiesoftheyoungstarsandtheirsurroundingdisksbringnewconstraintsonthepl
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Designing Ultra-flat Bands in Twisted Bilayer Materials at Large Twist Angles: Theory and Application to Two-Dimensional Indium Selenide

2022-02-25

ShengdanTao,XuanlinZhang,JiaojiaoZhu,PimoHe,ShengyuanA.Yang,YunhaoLu*,andSu-HuaiWeiIntertwistedbilayersoftwo-dimensional(2D)materialscanhostlow-energyflatbands,whichofferopportunitytoinvestigatemanyintriguingphysicsassociatedwithstrongelectroncorrelations.Intheexistingsystems,ultra-flatbandsonlyemergeatverysmalltwistangleslessthanafewdegrees,whichposesachallengeforexperimentalstudiesandpracticalapplications.Here,weproposeanewdesignprincipletoachievelow-energyultra-flatbandswithincreasedtwistangl
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Commensurate stacking phase transitions in an intercalated transition metal dichalcogenide

2021-12-13

XiaohuiYang,Jin-KeBao,ZhefengLou,PengLi,ChenxiJiang,JialuWang,TulaiSun,YabinLiu,WeiGuo,SitaramRamakrishnan,SuryaRohithKotla,MartinTolkiehn,CarstenPaulmann,Guang-HanCao,YuefengNie,WenbinLi,YangLiu,SandervanSmaalen,XiaoLin,Zhu-AnXuIntercalationandstacking-ordermodulationaretwoactivewaysinmanipulatingtheinterlayerinteractionoftransitionmetaldichalcogenides(TMDCs),whichleadtoavarietyofemergentphasesandallowforengineeringmaterialproperties.Herein,thegrowthofPb-intercalatedTMDCs–Pb(Ta1+xSe2)2,thefirst
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Long-Time Memory and Ternary Logic Gate Using a Multistable Cavity Magnonic System

2021-11-01

Rui-ChangShen,Yi-PuWang,JieLi,Shi-YaoZhu,G.S.Agarwal,andJ.Q.YouMultistabilityisanextraordinarynonlinearpropertyofdynamicalsystemsandcanbeexploredtoimplementmemoryandswitches.Hereweexperimentallyrealizethetristabilityinathree-modecavitymagnonicsystemwithKerrnonlinearity.Thethreestablestatesinthetristableregioncorrespondtothestablesolutionsofthefrequencyshiftofthecavitymagnonpolaritonunderspecificdrivingconditions.Wefindthatthesystemstayinginwhichstablestatedependsonthehistoryexperiencedbythesyste
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ATP Can Efficiently Stabilize Protein through a Unique Mechanism

2021-10-26

XinwenOu,YichongLao,JingjieXu,YaneeWutthinitikornkit,RuiShi,XiangjunChen*,andJingyuanLi*RecentexperimentssuggestedthatATPcaneffectivelystabilizeproteinstructureandinhibitproteinaggregationwhenitsconcentrationislessthan10mM,whichissignificantlylowerthancosolventconcentrationsrequiredinconventionalmechanisms.TheultrahighefficiencyofATPsuggestsauniquemechanismthatisfundamentallydifferentfrompreviousmodelsofcosolvents.Inthiswork,weusedmoleculardynamicssimulationandexperimentstostudytheinteractionsof
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Professor YUAN Huiqiu honored as an APS Fellow

2021-10-24

Prof.YUANHuiqiufromtheZhejiangUniversityDepartmentofPhysicshasbeenhonoredasa2021FellowoftheAmericanPhysicalSociety(APS),oneoftheworld’slargestandmostprestigiousorganizationsdedicatedtotheadvancementofphysics.Prof.Yuanwasspecificallycitedfor“hisoutstandingcontributiontotheresearchareasofunconventionalsuperconductivity,quantumcriticality,topologicalmaterialswithstrongelectroniccorrelations,andsuperconductorswithbrokeninversion/time-reversalsymmetry”.Prof.Yuan’sresearchincludesonvarioustopicsatthef
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