Phys. Rev. B 65, 193313 (2002) [4 pages]Chaotic front dynamics in semiconductor superlatticesReceived 11 December 2001; revised 13 February 2002; published 10 May 2002 We analyze the dynamical evolution of the current and the charge density in a superlattice for fixed external dc voltage in the regime of self-sustained current oscillations, using a microscopic sequential tunneling model. Fronts of accumulation and depletion layers which are generated at the emitter may collide and annihilate, thereby leading to a variety of different scenarios. We find complex chaotic regimes at high voltages and low contact conductivities. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.65.193313
DOI:
10.1103/PhysRevB.65.193313
PACS:
73.61.-r, 72.20.Ht, 05.45.Pq
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