Calculated electron drift velocity as a function of electric field at different magnetic fields. The inset shows the normalized drift velocity vs electric field with magnetic field , 2, 4, and 6 T, respectively.
Temporal evolution of current density at different magnetic field: (a) 0, (b) 2, (c) 4, and (d) 6 T. (The dc voltage is set as .)
Spatiotemporal evolution of electric-field domains shown as a density gray plot for different magnetic fields: (a) and (b) , respectively.
Poincaré bifurcation diagram of current density vs the ac driving amplitude at , the driving frequency .
Phase portraits (left) and first return maps (right) for different ac driving amplitudes: (a) 0.0015, (b) 0.0510, (c) 0.0556, (d) 0.0756, and (e) 0.1038.
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