Counting statistics of single electron transport in bilayer graphene quantum dots

Year: 2023

Type: article

Abstract: We measure telegraph noise of current fluctuations in an electrostatically defined quantum dot in bilayer graphene by real-time detection of single electron tunneling with a capacitively coupled neighboring quantum dot. Suppression of the second and third cumulant (related to shot noise) in a tunable graphene quantum dot is demonstrated experimentally. With this method we demonstrate the ability to measure very low current and noise levels. Furthermore, we use this method to investigate the first spin excited state, an essential prerequisite to measure spin relaxation.

Source: Physical Review Research

DOI: 10.1103/physrevresearch.5.013042

Authors: Rebekka Garreis, Jonas Daniel Gerber, Veronika Stará, Chuyao Tong, Carolin Gold, Marc Röösli, Kenji Watanabe, Takashi Taniguchi, Klaus Ensslin, Thomas Ihn, Annika Kurzmann

Institutions: ETH Zurich, Laboratory for Solid State Physics, Central European Institute of Technology, Brno University of Technology, Columbia University, National Institute for Materials Science, RWTH Aachen University

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funders: National Science Foundation, Graphene Flagship, European Commission, Ministry of Education, Culture, Sports, Science and Technology, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Japan Society for the Promotion of Science, Horizon 2020, National Center of Competence in Research Quantum Science and Technology, Core Research for Evolutional Science and Technology, HORIZON EUROPE Marie Sklodowska-Curie Actions

OpenAlex ID: W4317899723