Dresden 2009 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 9: Poster 1

HL 9.119: Poster

Monday, March 23, 2009, 14:30–17:00, P2

Investigation of Quantum Hall arrays for resistance standards — •Jens Könemann, Günter Hein, Bernhard Schumacher, Klaus Pierz, and Hans Werner Schumacher — Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig

Today’s quantum resistance standards are generally implemented using the integer Quantum Hall effect at filling factor i=2 corresponding to a quantized resistance value of R_Q=12.9 kΩ. Arranging several Hall bars in series or in parallel promises extending the range of quantized resistance values between 100 Ω and 1 MΩ, whilst maintaining low uncertainties within the order of some parts in 10⁹. In this work, we test the feasibility of such a resistance standard based on Quantum Hall arrays by interconnecting Hall bars with standard bonding technique. Additionally, we have realized a serial array of ten Hall bars with lithographically defined connections on chip. First high-precision measurements of such a device are presented on our poster.