Work

Realization of 5he2 with graphene quantum Hall resistance array

Year: 2020

Type: article

Abstract: We report on the realization of 10 quantum Hall devices in series fabricated using epitaxial graphene on silicon carbide. Precision measurements with a resistance bridge indicate that the quantized Hall resistance across an array at a filling factor of 2 is equivalent to 5he2 within the measurement uncertainty of approximately 4 × 10−8. A quantum Hall phase diagram for the array shows that a metrological quantization of 5he2 can be achieved at the magnetic field of 6 T and a temperature of 4 K. This experiment demonstrates the possibility of timely unchangeable resistance reference in various ranges in relaxed experimental conditions.

Source: Applied Physics Letters

DOI: 10.1063/1.5139965

Authors: Jaesung Park, Wan-Seop Kim, Dong-Hun Chae

Institution: Korea Research Institute of Standards and Science

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: hybrid

Funders: Korea Research Institute of Standards and Science, National Research Foundation of Korea

Awards: G2439511657, G614306453