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Fig. 3

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Schematic level diagram for a bilayer graphene quantum dot as a function of magnetic field B. At B=0, the quadruplet expected from spin and valley degeneracy is split into two doublets because of spin-orbit interactions. In a perpendicular magnetic field each doublet is split because of the valley Zeeman effect. A parallel magnetic field aligns the spins with the magnetic field and does not lift the degeneracy of the doublets.

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