Coulomb oscillation of a proton in a Ni-Nb-Zr-H glassy alloy with multiple junctions

Mikio Fukuhara, Asahi Kawashima, Shinichi Yamaura, Akihisa Inoue

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Electric current-induced voltage oscillation at 500-560 kHz was observed in the current-voltage curves of nanoscopic size (∼0.9 nm) tunnel junctions arranged in a low-capacitance (∼1 aF), multiple-junction configuration of (Ni42 Nb28 Zr30) 100-x Hx (5.2≤x≤15.2) glassy alloys in the temperature range of 205-6 K. This behavior appeared to be derived from Coulomb oscillation resulting from the tunneling of individual protons charging and discharging the vacancy capacitance of Zr-H - H-Zr atomic bond arrays among Zr-tetrahedral clusters, where is the vacancy barrier, termed the free volume, in the glassy alloys.

Original languageEnglish
Article number203111
JournalApplied Physics Letters
Volume90
Issue number20
DOIs
Publication statusPublished - 2007 May 28

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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