Axisymmetric pulse recycling and motion in bulk semiconductors

Details Axisymmetric pulse recycling and motion in bulk semiconductors Axisymmetric pulse recycling and motion in bulk semiconductors

2002-01-17

arxiv.org/abs/cond-mat/0201314v1

Phys. Rev. E 65, 016607 (2001)

Physics

Condensed Matter

Materials Science

8 pages, 15 figures

Scientific paper

10.1103/PhysRevE.65.016607

The Kroemer model for the Gunn effect in a circular geometry (Corbino disks) has been numerically solved. The results have been interpreted by means of asymptotic calculations. Above a certain onset dc voltage bias, axisymmetric pulses of the electric field are periodically shed by an inner circular cathode. These pulses decay as they move towards the outer anode, which they may not reach. As a pulse advances, the external current increases continuously until a new pulse is generated. Then the current abruptly decreases, in agreement with existing experimental results. Depending on the bias, more complex patterns with multiple pulse shedding are possible.

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