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The Hall Effect01:30

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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
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Two-Terminal and Multi-Terminal Designs for Next-Generation Quantized Hall Resistance Standards: Contact Material and

Mattias Kruskopf1, Albert F Rigosi2, Alireza R Panna2

  • 1Department of Physics, Joint Quantum Institute, University of Maryland, College Park, MD 20742 USA.

IEEE Transactions on Electron Devices
|March 3, 2020
PubMed
Summary
This summary is machine-generated.

Quantum Hall resistance measurements are as precise with two terminals as with four when using superconducting split contacts. This innovation simplifies next-generation quantized Hall resistance devices.

Keywords:
Epitaxial graphene (EG)multi-series (MS) contactsquantized Hall resistance (QHR) standardsquantum Hall effect (QHE)superconducting contacts

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Area of Science:

  • Condensed Matter Physics
  • Quantum Metrology

Background:

  • Traditional quantum Hall resistance measurements rely on four-terminal setups.
  • Minimizing contact and terminal resistance is crucial for accurate measurements.

Purpose of the Study:

  • To demonstrate the precision of two-terminal quantum Hall resistance measurements.
  • To explore the use of superconducting split contacts for improved device design.

Main Methods:

  • Utilizing superconducting split contacts in sample designs.
  • Performing quantum Hall resistance measurements with a two-terminal configuration.

Main Results:

  • Achieved precision comparable to four-terminal measurements.
  • Eliminated resistance contributions from terminals and contacts.

Conclusions:

  • Two-terminal measurements with superconducting split contacts offer high precision.
  • Enables significant improvements in the size and complexity of quantized Hall resistance devices.