Mini array of quantum Hall devices based on epitaxial graphene

S. Novikov, N. Lebedeva, Jussi Hämäläinen, Ilkka Iisakka, P. Immonen, A. J. Manninen, A. Satrapinski

    Research output: Contribution to journalArticleScientificpeer-review

    15 Citations (Scopus)

    Abstract

    Series connection of four quantum Hall effect (QHE) devices based on epitaxial graphene films was studied for realization of a quantum resistance standard with an up-scaled value. The tested devices showed quantum Hall plateaux RH,2 at a filling factor v = 2 starting from a relatively low magnetic field (between 4 T and 5 T) when the temperature was 1.5 K. The precision measurements of quantized Hall resistance of four QHE devices connected by triple series connections and external bonding wires were done at B = 7 T and T = 1.5 K using a commercial precision resistance bridge with 50 μA current through the QHE device. The results showed that the deviation of the quantized Hall resistance of the series connection of four graphene-based QHE devices from the expected value of 4×RH,2 = 2 h/e2 was smaller than the relative standard uncertainty of the measurement (-7) limited by the used resistance bridge.

    Original languageEnglish
    Article number174504
    Number of pages6
    JournalJournal of Applied Physics
    Volume119
    Issue number17
    DOIs
    Publication statusPublished - 7 May 2016
    MoE publication typeA1 Journal article-refereed

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