2017/04/05 by S. P. Giblin, M. -H. Bae, M-H Bae +3
Chemistry · Computer Science · Engineering · Physics and Astronomy · #Atomic and Subatomic Physics Research #Cascade #Chemistry #Current (fluid) #Electrical engineering #Electron #Engineering #Gallium arsenide #Materials science #Optoelectronics #Physics #Power (physics) #Quantum Information and Cryptography #Quantum and electron transport phenomena #Voltage #cond-mat.mes-hall
paper · pdf · doi:10.1088/1681-7575/aa634c
published as Metrologia vol. 54, pp 299-306 (2017) · 13 pages, 7 figures (4 in main text and 3 in supplementary info
openalex publication_date 2017/04/05 · arxiv created 2018/09/28 · arxiv updated 2018/10/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We demonstrate the robust operation of a gallium arsenide tunable-barrier single-electron pump operating with 1 part-per-million accuracy at a temperature of 1.3 K and a pumping frequency of 500 MHz. The accuracy of current quantisation is investigated as a function of multiple control parameters, and robust plateaus are seen as a function of three control gate voltages and RF drive power. The electron capture is found to be in the decay-cascade, rather than the thermally-broadened regime. The observation of robust plateaus at an elevated temperature which does not require expensive refrigeration is an important step towards validating tunable-barrier pumps as practical current standards.