Thermal and quantum phase slips in niobium-nitride nanowires based on suspended carbon nanotubes

Kohei Masuda, Satoshi Moriyama, Yoshifumi Morita, Katsuyoshi Komatsu, Tasuku Takagi, Takayuki Hashimoto, Norihisa Miki, Takasumi Tanabe, Hideyuki Maki

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Abstract

Superconducting nanowires have attracted considerable attention due to their unique quantum-mechanical properties, as well as their potential as next-generation quantum nanodevices, such as single-photon detectors, phase-slip (PS) qubits, and other hybrid structures. In this study, we present the results of one-dimensional (1D) superconductivity in nanowires fabricated by coating suspended carbon nanotubes with a superconducting thin niobium nitride (NbN) film. In the resistance-temperature characteristic curves, hallmarks of 1D superconductivity with PS events are observed with unconventional negative magnetoresistance. We also confirm that a crossover occurs between thermal and quantum PSs as the temperature is lowered.

Original languageEnglish
Article number222601
JournalApplied Physics Letters
Volume108
Issue number22
DOIs
Publication statusPublished - 2016 May 30

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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