Role of antisymmetric orbitals and electron-electron interactions on the two-particle spin and valley blockade in graphene double quantum dots

S. Möller; L. Banszerus; K. Hecker; H. Dulisch; K. Watanabe; T. Taniguchi; C. Volk; C. Stampfer

doi:10.1103/physrevb.111.165416

ジャーナル論文 Role of antisymmetric orbitals and electron-electron interactions on the two-particle spin and valley blockade in graphene double quantum dots

; ; ; ;

;

; ;

Download file (12.6MB)
Download as zip (12.2MB)

コレクション

引用

S. Möller, L. Banszerus, K. Hecker, H. Dulisch, K. Watanabe, T. Taniguchi, C. Volk, C. Stampfer. Role of antisymmetric orbitals and electron-electron interactions on the two-particle spin and valley blockade in graphene double quantum dots. Physical Review B. 2025, 111 (16), 165416. https://doi.org/10.1103/physrevb.111.165416

(BibTeX)

説明:

(abstract)

We report on an experimental study of spin and valley blockade in two-electron bilayer graphene (BLG) double quantum dots (DQDs) and explore the limits set by asymmetric orbitals and electron- electron interactions. The results obtained from magnetotransport measurements on two-electron BLG DQDs, where the resonant tunneling transport involves both orbital symmetric and antisymmetric two-particle states, show a rich level spectrum. We observe a magnetic field tunable spin and valley blockade, which is limited by the orbital splitting, the strength of the electron-electron interaction and the difference in the valley g-factors between the symmetric and antisymmetric two- particle orbital states. Our conclusions are supported by simulations based on rate equations, which allow the identification of prominent interdot transitions associated with the transition from single to two-particle states observed in the experiment.

権利情報: