Coulomb oscillation of a deuteron in a Ni-Nb-Zr-D glassy alloy with multiple junctions

M. Fukuhara; A. Inoue

doi:10.1209/0295-5075/83/36002

All issues

Volume 83 / No 3 (August 2008)

EPL, 83 3 (2008) 36002

Abstract

Issue		EPL Volume 83, Number 3, August 2008


Article Number		36002
Number of page(s)		5
Section		Condensed Matter: Structural, Mechanical and Thermal Properties
DOI		https://doi.org/10.1209/0295-5075/83/36002
Published online		23 July 2008

EPL, 83 (2008) 36002

Coulomb oscillation of a deuteron in a Ni-Nb-Zr-D glassy alloy with multiple junctions

M. Fukuhara and A. Inoue

Institute for Materials Research, Tohoku University - Sendai 980-8577, Japan

Corresponding author: fukuhara@imr.tohoku.ac.jp

Received: 28 April 2008
Accepted: 9 June 2008

Abstract

Electric-current-induced voltage oscillation at 600-740 kHz was observed in the current-voltage curves of nanoscopic size tunnel junctions arranged in a low-capacitance, multiple-junction configuration of ((Ni₆₀Nb₄₀) $_{100-x}$ Zr_x) $_{100-y}$ D_y ( $x=30$ , 35, 40 and 45, 9.1 $\leqslant y\leqslant$ 14.8) glassy alloys in the temperature range of 373 K to 6 K. This behavior appeared to be derived from Coulomb oscillation resulting from the tunneling of individual deuteron charging and discharging the vacancy capacitance of Zr-D- $\square$ -D-Zr atomic bond arrays among Zr-tetrahedral clusters, where $\square$ is the vacancy barrier between clusters.

PACS: 61.43.Dq – Amorphous semiconductors, metals, and alloys / 73.21.La – Quantum dots / 73.23.Hk – Coulomb blockade; single-electron tunneling

© EPLA, 2008

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