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DS: Fachverband Dünne Schichten

DS 14: 2D Materials II (joint session DS/HL)

DS 14.7: Vortrag

Mittwoch, 11. März 2026, 16:45–17:00, REC/C213

Quantum dots in proximitized BLG/TMD heterostructures — •Ching-Hung Chiu and Angelika Knothe — Institut für Theoretische Physik, Universität Regensburg, 93053 Regensburg, Germany

Bilayer graphene (BLG) has attracted attention recently due to the possibility of inducing layer-selective Spin-orbit coupling (SOC) by proximitizing with transition metal dichalcogenides (TMDs) [1,2]. Simultaneously, the gate-tunable band gap in BLG enables electrostatic confinement of charge carriers into gate-defined quantum point contacts and quantum dots [3,4]. Here, we theoretically investigate the interplay of proximity effects and confinement by studying confined quantum states in proximitized BLG/TMD quantum dots. We calculate the states’ properties, such as their splittings and spin polarisation, as a function of SOC coupling parameters and the dot’s size and shape. Our studies go alongside experimental realisations of confinement in BLG/TMD heterostructures [5,6] and pave the way for using and controlling the dot’s spin and valley states as qubits.

[1] K. Zollner and J. Fabian, Phys. Rev. B 104, 075126 (2021)

[2] A. M. Seiler et al., 2025 2D Mater. 12 035009

[3] H. Overweg et al,, Phys. Rev. Lett. 121, 257702 (2018)

[4] S. Möller et al., Phys. Rev. Lett. 127, 256802 (2021)

[5] J. D. Gerber et al., Nano Lett. 2025, 25, 33, 12480-12486

[6] H. Dulisch et al., Nano Lett. 2025, 25, 26, 10549-10555

Keywords: Bilayer graphene; Proximity effect; Spin-Orbit coupling; Quantum dot