Increasing the perpendicular electric field in a bilayer graphene quantum dot switches the lowest shell filling from 4 electrons with a 2+2 spin sequence to 12 electrons with a 6+6 spin sequence, via trigonal warping minivalleys.
Flavor Quantum Dots and Artificial Quark Model in Transition Metal Dichalcogenides
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We show that the triply degenerate Q valleys in few-layer transition metal dichalcogenides provide a unique platform for exploring the rare flavor SU(3) symmetry in quantum dot geometry. The single and double dots are reminiscent of the quark model and eightfold way, and their many-body triplets and octets may be regarded as artificial quarks and hadrons. For the artificial quark transistor, each level hosts one central and two side Coulomb peaks of irrational height ratios, and flavor Kondo effects occur at 1/3 and 2/3 fillings with fractional conductance quantization in the unitary limit.
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Switching spin filling sequence in a bilayer graphene quantum dot through trigonal warping
Increasing the perpendicular electric field in a bilayer graphene quantum dot switches the lowest shell filling from 4 electrons with a 2+2 spin sequence to 12 electrons with a 6+6 spin sequence, via trigonal warping minivalleys.