Recent breakthroughs in the transport spectroscopy of 2-D material quantum-dot platforms have engendered a fervent interest in spin–valley qubits. In this context, Pauli blockades in double quantum dot structures form a crucial basis for multi-qubit initialization and manipulation. Focusing on double quantum dot structures in the bilayer graphene platform, and the experimental results, we develop…
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Generating valley contrasts and achieving valley-specific transport of Dirac fermions in graphene are inherently challenging due to isotropic transport. In this work, we propose a tilted PN junction structure to induce anisotropic chiral transport within otherwise isotropic Dirac systems. By introducing a junction tilt, we modify the conservation conditions of pseudo-spin modes, effectively segregation valleys…
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