Edge channel confinement in a bilayer graphene n-p-n quantum dot

被引：4

作者：

Overweg, Hiske ^{[1
]}

Rickhaus, Peter ^{[1
]}

Eich, Marius ^{[1
]}

Lee, Yongjin ^{[1
]}

Pisoni, Riccardo ^{[1
]}

Watanabe, Kenji ^{[2
]}

Taniguchi, Takashi ^{[2
]}

Ihn, Thomas ^{[1
]}

Ensslin, Klaus ^{[1
]}

机构：

[1] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[2] Natl Inst Mat Sci, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

来源：

NEW JOURNAL OF PHYSICS | 2018年 / 20卷

基金：

瑞士国家科学基金会;

关键词：

quantum Hall edge channels; bilayer graphene; quantum dot; p-n junction; COULOMB-BLOCKADE OSCILLATIONS; HALL REGIME; DEVICES; TRANSPORT; STATES;

D O I：

10.1088/1367-2630/aa9cd3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Wecombine 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.

引用

页数：6

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