Edge channel confinement in a bilayer graphene n–p–n quantum dot. (9th January 2018)

• Record Type: Journal Article
• Authors: Overweg, Hiske; Rickhaus, Peter; Eich, Marius; Lee, Yongjin; Pisoni, Riccardo; Watanabe, Kenji; Taniguchi, Takashi; Ihn, Thomas; Ensslin, Klaus
• Is Part Of: New journal of physics. Volume 20:Number 1(2018:Jan.)
• Publication Date: 2018-01-09
• Subjects: quantum Hall edge channels -- bilayer graphene -- quantum dot -- p–n junction; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aa9cd3
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: We combine electrostatic and magnetic confinement to define a quantum dot in bilayer graphene. The employed geometry couples n -doped reservoirs to a p -doped dot. At magnetic field values around B = 2 T, Coulomb blockade is observed. This demonstrates that the coupling of the copropagating modes at the p – n interface is weak enough to form a tunnel barrier, facilitating transport of single charge carriers onto the dot. This result may be of use for quantum Hall interferometry experiments.