Mini array of quantum Hall devices based on epitaxial graphene

S. Novikov, N. Lebedeva, J. Hämäläinen, I. Iisakka, P. Immonen, Antti Manninen, A. Satrapinski

Research output: Contribution to journalArticleScientificpeer-review

14 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 (<1 × 10−7) limited by the used resistance bridge.
Original languageEnglish
Article number174504
JournalJournal of Applied Physics
Volume119
Issue number17
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • graphene
  • metrology
  • quantum Hall effect
  • array
  • resistance

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