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Weak Antilocalization in Epitaxial Graphene: Evidence for Chiral Electrons
Transport in ultrathin graphite grown on silicon carbide is dominated by the electron-doped epitaxial layer at the interface. Weak antilocalization in 2D samples manifests itself as a broad cusplike depression in the longitudinal resistance for magnetic fields $10\text{ }\text{ }\mathrm{mT}<B<5\text{ }\text{ }\mathrm{T}$. An extremely sharp weak-localization resistance peak at $B=0$ …