Volume 83, Number 3, August 2008
Article Number 36002
Number of page(s) 5
Section Condensed Matter: Structural, Mechanical and Thermal Properties
Published online 23 July 2008
EPL, 83 (2008) 36002
DOI: 10.1209/0295-5075/83/36002

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

received 28 April 2008; accepted in final form 9 June 2008; published August 2008
published online 23 July 2008

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-xZrx)100-y Dy (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.

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

© EPLA 2008