MScProject:
MajoranasinInAsSb-epitaxial-Alnanowires
Background:
ThefirstdetectionofMajoranasinsemiconductornanowireshasdrawnenormousinterestsincondensedmatterphysicscommunity[1].Greateffortsandadvanceshavebeenachievedinthisfieldoverthelastfewyears,frommaterialgrowthtotransportexperimentsandtheoreticalunderstanding.However,afundamentalquestionregardingwhethercurrentexperimentalresultscanbeusedasthe“smoking-gun”evidencefortheexistenceofMajoranasstillremainscontroversial.Thisisbecauseofthefollowingtworeasons.First,manyalternativeexplanationshavebeenproposedtointerprettheMajoranaexperiments.Thesealternativesaredifficulttoberuledoutbasedoncurrentexperimentalresults.Second,manyimportant(orevenunique)behaviourspredictedfromthebasicMajoranatheoryhavenotbeenobservedinexperimentsyet.Therefore,ourgoalistofullyestablishMajoranasbyrulingoutalternatives,andmoreimportantly,byobservingthepredictedMajoranabehaviours(e.g.quantizedconductance,oscillationsandcorrelations).
TheProject:
OneimportantwaytoimprovethecurrentMajoranaexperimentistosearchforbettersemiconductornanowiresystemswithlargerspin-orbitcouplingandlargerLandé𝑔-factor.ComparedtoourcurrentInSbnanowires,InAsSbnanowiresarepredictedtohaveaspin-orbitcouplingthatisanorderofmagnitudestronger,anda𝑔-factorthatis4timeslarger[2].InthisprojectyouwillfocusonconductingbetterandmoreconvincingMajoranaexperimentsinInAsSb-baseddevices.
Whattheprojectoffers:
• Techniquetrainingofnano-fabrication,cryogenics,andlownoiseelectronicmeasurement.• Working,studyinganddiscussingthecutting-edgeMajoranaresearch.
Whatwearelookingfor:
Highlymotivatedmasterstudentwhohasgoodteamcollaboration.
Formoreinformationaboutthisproject,pleasefeelfreetocontact:DiXu([email protected])andHaoZhang([email protected])
References:
[1]V.Mouriketal.Science336,1003(2012)[2]G.Winkleretal.Phys.Rev.Lett.117,076403(2016)
