Dynamic instabilities in resonant tunneling induced by a magnetic field

Details Dynamic instabilities in resonant tunneling induced by a magnetic field Dynamic instabilities in resonant tunneling induced by a magnetic field

1997-06-13

arxiv.org/abs/cond-mat/9706144v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, accepted in Phys. Rev. Letters

Scientific paper

10.1103/PhysRevLett.79.1118

We show that the addition of a magnetic field parallel to the current induces self sustained intrinsic current oscillations in an asymmetric double barrier structure. The oscillations are attributed to the nonlinear dynamic coupling of the current to the charge trapped in the well, and the effect of the external field over the local density of states across the system. Our results show that the system bifurcates as the field is increased, and may transit to chaos at large enough fields.

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