Share Email Print

Proceedings Paper

Tunneling conductance of metaloxide junctions
Author(s): Vladimir M. Svistunov; A. I. Khachaturov; M. A. Belogolovskii
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The differential conductance behavior of metal/insulator/metaloxide and metaloxide/insulator/metaloxide tunnel structures has been studied. It is found that because of small Fermi energies of metaloxides a number of universally accepted principles of tunneling spectroscopy of conventional materials cease to be valid. First, the shape of tunneling characteristics of a metaloxide is unusually sensitive to barrier parameters: the thickness of the insulating layer and the barrier height. If the barrier height is quite large or the thickness is small the dependence of tunnel conductance on voltage for a metaloxide/insulator/metaloxide structure manifests a zero-bias 'peak resistance' anomaly. On further increasing the height or decreasing the thickness the dependence of conductance (sigma) versus voltage V decreases throughout the entire range of voltages. Second, the parabola-like dependence of (sigma) (V) for a metal/insulator/metaloxide structure calculated for a symmetrical rectangular potential barrier appears not to be symmetrical. Its minimum occurs at a finite voltage. Finally, in contrast to metal/oxide/metal contacts the metaloxide tunnel characteristics calculated in the WKB-approximation differ considerably from the corresponding ones obtained in the 'sharp boundaries' model.

Paper Details

Date Published: 10 June 1996
PDF: 7 pages
Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); doi: 10.1117/12.241800
Show Author Affiliations
Vladimir M. Svistunov, A.A. Galkin Physico-Technical Institute (Ukraine)
A. I. Khachaturov, A.A. Galkin Physico-Technical Institute (Ukraine)
M. A. Belogolovskii, A.A. Galkin Physico-Technical Institute (Ukraine)

Published in SPIE Proceedings Vol. 2696:
Spectroscopic Studies of Superconductors
Ivan Bozovic; Dirk van der Marel, Editor(s)

© SPIE. Terms of Use
Back to Top