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Next-generation crossover-free quantum Hall arrays with superconducting interconnections

TitleNext-generation crossover-free quantum Hall arrays with superconducting interconnections
Publication TypeJournal Article
Year of Publication2019
AuthorsM. Kruskopf, A. F. Rigosi, A. R. Panna, M. Marzano, D. Patel, H. Jin, D. B. Newell, and R. E. Elmquist
JournalMetrologia
Volume56
Pagination065002
Date PublishedDEC
Type of ArticleArticle
ISSN0026-1394
Keywordsepitaxial graphene, multiple connection, quantized Hall array resistance standards, quantum Hall effect, split contacts, superconducting contacts
Abstract

This work presents precision measurements of quantized Hall array resistance devices using superconducting, crossover-free and multiple interconnections as well as graphene split contacts. These new techniques successfully eliminate the accumulation of internal resistances and leakage currents that typically occur at interconnections and crossing leads between interconnected devices. As a result, a scalable quantized Hall resistance array is obtained with a nominal value that is as precise and stable as that from single-element quantized Hall resistance standards.

DOI10.1088/1681-7575/ab3ba3