Fractal Dimensions from Chaotic Oscillations in Semi-Insulating GaAs |
| A. Zduniak and J. Łusakowski Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland |
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| Relaxation and domain current oscillations in undoped semi-insulating GaAs were observed at room temperature for a broad range of voltage applied to a sample. The oscillations were characterized by a reconstruction of an attractor of the system. An analysis of the attractor helped to discriminate between the two likes of oscillations. A transition from one like of oscillations to the other was connected with a chaotization of the current. A chaotic state of the system was analyzed by calculations of fractal dimensions Dq for -0.6 < g < 40 and the f(α) function. |
| DOI: 10.12693/APhysPolA.84.575 PACS numbers: 05.45.+b, 72.20.Ht |