Precision measurement of single-electron current with quantized Hall array resistance and Josephson voltage

Title
Precision measurement of single-electron current with quantized Hall array resistance and Josephson voltage
Authors
송진동박석인Myung-Ho BaeDong-Hun ChaeMun-Seog KimBum-Kyu KimTakehiko OeNobu-Hisa KanekoNam KimWan-Seop Kim
Keywords
single-electron current; quantized Hall; Josephson voltage
Issue Date
2020-10
Publisher
Metrologia
Citation
VOL 57, 065025
Abstract
A single electron pump was incorporated with a quantum Hall resistance and a Josephson voltage for the current evaluation in the framework of Ohm’s law. The pump current of about 60 pA level was amplified by a stable amplifier with a gain of 103 to induce a Hall voltage of about 60 mV level across a 1 MΩ Hall resistance array, which was compared with the Josephson voltage. The gain of the current amplifier was calibrated with a cryogenic current comparator bridge. For two different drive frequencies and repeated thermal cycles, the comparisons demonstrated that the pump current averaged over the first plateau was equal to ef within the combined uncertainty level of 0.3 × 10?6 (k = 1).
URI
http://pubs.kist.re.kr/handle/201004/72121
ISSN
0026-1394
Appears in Collections:
KIST Publication > Article
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