Laser produced percolation structures

Thuillard, M.; von Allmen, M.
April 1986
Applied Physics Letters;4/21/1986, Vol. 48 Issue 16, p1045
Academic Journal
Pulsed laser irradiation of thin Ti films yields structures consisting of metallic islands connected by oxide filaments. The sheet resistivity of the structure is mostly determined by the degree of oxidation of the filaments and can be varied through the laser fluence. By adding gold to the initial layer, the same structures are obtained but oxidation is inhibited. The material is essentially a two-dimensional bond percolator. The temperature coefficient of the resistance is drastically reduced compared to that of the previously investigated Ti-TiOx structures.


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