Mapping the Chemical Potential Landscape of a Triple Quantum Dot
arXiv:1609.03381 · doi:10.1103/PhysRevB.94.054314
Abstract
We investigate the non-equilibrium charge dynamics of a triple quantum dot and demonstrate how electron transport through these systems can give rise to non-trivial tunnelling paths. Using a real-time charge sensing method we establish tunnelling pathways taken by particular electrons under well-defined electrostatic configurations. We show how these measurements map to the chemical potentials for different charge states across the system. We use a modified Hubbard Hamiltonian to describe the system dynamics and show that it reproduces all experimental observations.
arXiv comment7 pages, 3 figures
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