Evidence For Heavy Hole and Light Hole Current Separation in P-Type Resonant Tunneling Diodes With Prewells

R. M. Lewis; H. P. Wei; S. Y. Lin; J. F. Klem

paper

Evidence For Heavy Hole and Light Hole Current Separation in P-Type Resonant Tunneling Diodes With Prewells

arXiv:cond-mat/0005421

Abstract

We investigate the transport of holes through $A l A s / I n_{.10} G a_{.90} A s$ resonant tunneling diodes which utilize $I n_{x} G a_{1 - x} A s$ prewells in the emitter with $x = 0, .10,$ and $.20$ . The data show an increase in peak current and bias at resonance and a concurrent increase in the peak-to-valley ratio with increasing x. We explain this enhancement in tunneling as due to confinement (or localiz- ation) of charges in the prewell and the formation of direct heavy(light) hole to heavy(light) hole conduction channels as a consequence.