Magneto-transport Spectroscopy of Hole Quantum Dots in Monolayer WSe₂

Towards the objective of achieving practical quantum devices in which qubits can be realized with carriers confined in two-dimensional (2D) transition metal dichalcogenides (TMDs) quantum dots, we perform transport experiments revealing the magneto-spectroscopy of a hole quantum dot in monolayer tungsten diselenide (WSe₂) in the Coulomb blockade regime. TMD-based qubits are of particular interest due to properties such as: strong spin-orbit coupling for qubit manipulation^1,2, spin-valley locking for qubit robustness and potentially long coherence times, as well as an optically active band dispersion for photonic-solid-state hybrid architectures. In this talk, we present transport spectroscopy measurements of an incidental gate-controlled hole quantum dot formed in a monolayer WSe₂ heterostructure. By applying a perpendicular magnetic field, we observe the evolution of several consecutive Coulomb blockade peaks at low and high bias giving insight into the physics of ground and excited states of this system. These results provide a better understanding of the interplay between valley and spin degrees of freedom in TMD quantum dots.

1. Altintas, Bieniek, Dusko, Korkusinski, Pawlowski and Hawrylak Physical Review B 104 (2021) 195412

2. Pawlowski, Bieniek and Wozniak Physical Review Applied 15 (2021) 054025