This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1021/acs.nanolett.9b05295 in citations.
Please use the identifier: http://hdl.handle.net/2128/25139 in citations.
Single-Electron Double Quantum Dots in Bilayer Graphene
Single-Electron Double Quantum Dots in Bilayer Graphene
We present transport measurements through an electrostatically defined bilayer graphene double quantum dot in the single-electron regime. With the help of a back gate, two split gates, and two finger gates, we are able to control the number of charge carriers on two gate-defined quantum dots indepen...
Saved in:
Personal Name(s): | Banszerus, Luca (Corresponding author) |
---|---|
Möller, Samuel / Icking, Eike / Watanabe, Kenji / Taniguchi, Takashi / Volk, Christian / Stampfer, Christoph | |
Contributing Institute: |
Halbleiter-Nanoelektronik; PGI-9 JARA-FIT; JARA-FIT |
Published in: | Nano letters, 20 (2020) 3, S. 2005 - 2011 |
Imprint: |
Washington, DC
ACS Publ.
2020
|
PubMed ID: |
32083885 |
DOI: |
10.1021/acs.nanolett.9b05295 |
Document Type: |
Journal Article |
Research Program: |
Controlling Electron Charge-Based Phenomena |
Link: |
Restricted Published on 2020-02-21. Available in OpenAccess from 2021-02-21. Restricted Published on 2020-02-21. Available in OpenAccess from 2021-02-21. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/25139 in citations.
We present transport measurements through an electrostatically defined bilayer graphene double quantum dot in the single-electron regime. With the help of a back gate, two split gates, and two finger gates, we are able to control the number of charge carriers on two gate-defined quantum dots independently between zero and five. The high tunability of the device meets requirements to make such a device a suitable building block for spin-qubits. In the single-electron regime, we determine interdot tunnel rates on the order of 2 GHz. Both, the interdot tunnel coupling as well as the capacitive interdot coupling increase with dot occupation, leading to the transition to a single quantum dot. Finite bias magneto-spectroscopy measurements allow to resolve the excited-state spectra of the first electrons in the double quantum dot and are in agreement with spin and valley conserving interdot tunneling processes. |