Double quantum dots in atomically-precise graphene nanoribbons
Abstract
Bottom-up synthesized graphene nanoribbons (GNRs) are precise quantum materials, offering a high degree of tunability of their physical properties. While field-effect transistors and single quantum dot (QD) devices have been reported, the fabrication of double QD devices using GNRs remains challenging due to their nanometer-scale dimensions. In this study, we present a multi-gate double QD device based on atomically precise GNRs that are contacted by a pair of single-walled carbon nanotube electrodes. At low temperatures, the device can be tuned with multiple gates and reveals triangular features characteristic for charge transport through a double QD system. From these features, the QD level spacing, as well as the interdot tunnel coupling and lead-dot tunnel couplings are extracted. Double QD systems serve as essential building blocks for developing different types of qubits based on atomically precise GNRs.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 01, 2023
- Source ID
- 10.1088/2633-4356/acfa57
Entities
People
- Gabriela B. Barin
- Jian Zhang
- Jin Zhang
- Klaus Müllen
- Liu Qian
- Michel Calame
- Mickael L Perrin
- Pascal Ruffieux
- Peipei Chen
- Roman Fasel
Organizations
- Office of Naval Research
- Swiss National Science Foundation
- Werner Siemens-Stiftung