Spontaneous current oscillations which develop chaotic behavior are reported for an electron-hole plasma in a crystal of Ge at 77 K in parallel electric and magnetic fields. The observed behavior includes a period-doubling route to chaos with increasing applied electric field, regions of broadband noise which contain noise-free periodic windows, and bifurcations from quasiperiodic states to turbulence. A rate-equation model, which includes nonlinear coupling between unstable and damped plasma density waves, is presented.
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Held et al. (1984) studied this question.
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