Helical instabilities in an electron-hole plasma in Ge in parallel dc electric and magnetic fields are known to exhibit chaotic behavior. By fabricating probe contacts along the length of a Ge crystal we study the spatial structure of these instabilities, finding two types: (i) spatially coherent and temporally chaotic helical density waves characterized by strange attractors of fractal dimension d~3, and (ii) beyond the onset of spatial incoherence, instabilities of indeterminately large fractal dimension $d>8$. A transition between these two types of behavior is observed as the applied fields are increased.
No takes yet. Share an insight, caveat, or question.
Held et al. (1985) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: