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Ultrahigh mobilitate electronica in grafen suspendata

Rezumat: Am realizat mobilitati in plus fata de 200000 cm ^ 2/Vs la densitatea de electroni de ~ 2 * 10 ^ 11 cm ^ -2, prin suspendarea grafen un singur strat. Suspendarea ~ 150 nm de mai sus poarta un electrod Si/SiO_2 si contacte electrice pentru grafen a fost realizat printr-o combinatie de litografie cu fascicul de electroni si gravura. Specimenele au fost curatate in situ de angajarea de curent induse de incalzire, care rezulta direct intr-o imbunatatire semnificativa de transport electrice. Concomitent cu accesoriu mobilitate mare, latime a varfurilor caracteristice Dirac sunt reduse cu un factor de 10, comparativ cu traditionale, non-suspendate dispozitive. Acest avans ar trebui sa permita accesarea proprietatilor intrinseci de transport de graphene.