Direct Comparison of Quantum Hall Resistance in Graphene and Gallium Arsenide in Liquid Helium |
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| Ngoc Thanh Mai Tran, Jaesung Park, Dong-Hun Chae |
- Abstract:
- Direct comparison of quantum Hall resistance in the same or different materials requires demanding experimental resources, such as two separate cryostats or a specially designed dual-socket probe operating far below the temperature of liquid helium. Here we experimentally demonstrate an efficient direct comparison of quantum Hall resistance in graphene and gallium arsenide/aluminium gallium arsenide heterostructure in liquid helium at 4.2 K with a standard probe from the practical point of view. To perform the direct comparison with one probe, we stacked two Hall devices with a printed circuit board and mating pins and employed a gallium arsenide Hall device with a high electron density. The direct comparison shows that the relative difference in quantized Hall resistance between the two materials in liquid helium is as small as 5 nΩ/Ω.
- Download:
- IMEKO-TC4-2022-02.pdf
- DOI:
- 10.21014/tc4-2022.02
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 Symposium 2022
- Title:
25th IMEKO TC4 Symposium and 23nd International Workshop on ADC and DAC Modelling and Testing (IWADC)
- Place:
- Brescia, ITALY
- Time:
- 12 September 2022 - 14 September 2022