FluctuatingmagnetismandPomeranchuk
effectinmultilayergraphene
111112
/10.1038/s41586-025-08725-5LudwigHolleis,TianXie,SiyuanXu,HaoxinZhou,CaitlinL.Patterson,ArchismanPanigrahi,
34215
TakashiTaniguchi,KenjiWatanabe,LeonidS.Levitov,ChenhaoJin,ErezBerg
Received:12July20241??
AndreaF.Young
Accepted:31January2025
Publishedonline:xxxxxxxx
Magnetismtypicallyarisesfromtheefectofexchangeinteractionsonhighly
Checkforupdateslocalizedfermionicwavefunctionsinf-andd-atomicorbitals.Bycontrast,in
rhombohedralmultilayergraphene(RMG),magnetism—manifestingasspontaneous
polarizationintooneormorespinandvalleyfavours1–7—originatesfromitinerant
electronsnearaVanHovesingularity.Hereweshowexperimentallythatthe
electronicentropyinthissystemindicatessignaturestypicallyassociatedwith
disorderedlocalmagneticmoments,unexpectedforelectronsinafullyitinerant
metal.Specifcally,wefndacontributionΔS?≈?1?kBperchargecarrierthatbeginsatthe