Dynamic instability in resonant tunneling

Article

关键词: INTRINSIC BISTABILITY;    MAGNETIC-FIELD;    DOUBLE BARRIERS;   

DOI  :  10.1103/PhysRevB.64.201405

来源: SCIE

【 摘 要 】

We show that a novel instability may be present in resonant tunneling through a quantum well in one, two, and three dimensions, when the resonance lies near the emitter Fermi level. A simple semiclassical model which simulates the resonance and the projected density of states by a nonlinear conductor, the Coulomb barrier by a capacitance, and the time evolution by an iterated map, is used. The model reproduces the observed hysteresis in such devices, and exhibits a series of bifurcations leading to fast chaotic current fluctuations.

【 授权许可】

Free